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International relations (IR), sometimes referred to as international studies and international affairs, is the scientific study of interactions between
sovereign state A sovereign state or sovereign country, is a political entity represented by one central government that has supreme legitimate authority over territory. International law defines sovereign states as having a permanent population, defined te ...
s. In a broader sense, it concerns all activities between states—such as
war War is an intense armed conflict between states, governments, societies, or paramilitary groups such as mercenaries, insurgents, and militias. It is generally characterized by extreme violence, destruction, and mortality, using regular o ...
,
diplomacy Diplomacy comprises spoken or written communication by representatives of states (such as leaders and diplomats) intended to influence events in the international system.Ronald Peter Barston, ''Modern diplomacy'', Pearson Education, 2006, p. ...
,
trade Trade involves the transfer of goods and services from one person or entity to another, often in exchange for money. Economists refer to a system or network that allows trade as a market. An early form of trade, barter, saw the direct excha ...
, and foreign policy—as well as relations with and among other international actors, such as
intergovernmental organisations An international organization or international organisation (see spelling differences), also known as an intergovernmental organization or an international institution, is a stable set of norms and rules meant to govern the behavior of states a ...
(IGOs), international nongovernmental organisations (INGOs), international legal bodies, and
multinational corporation A multinational company (MNC), also referred to as a multinational enterprise (MNE), a transnational enterprise (TNE), a transnational corporation (TNC), an international corporation or a stateless corporation with subtle but contrasting senses, i ...
s (MNCs). There are several
schools of thought A school of thought, or intellectual tradition, is the perspective of a group of people who share common characteristics of opinion or outlook of a philosophy, discipline, belief, social movement, economics, cultural movement, or art movement. ...
within IR, of which the most prominent are realism,
liberalism Liberalism is a political and moral philosophy based on the rights of the individual, liberty, consent of the governed, political equality and equality before the law."political rationalism, hostility to autocracy, cultural distaste for c ...
, and
constructivism Constructivism may refer to: Art and architecture * Constructivism (art), an early 20th-century artistic movement that extols art as a practice for social purposes * Constructivist architecture, an architectural movement in Russia in the 1920s a ...
. International relations is widely classified as a major subdiscipline of
political science Political science is the scientific study of politics. It is a social science dealing with systems of governance and power, and the analysis of political activities, political thought, political behavior, and associated constitutions and la ...
, along with
comparative politics Comparative politics is a field in political science characterized either by the use of the ''comparative method'' or other empirical methods to explore politics both within and between countries. Substantively, this can include questions relatin ...
and political theory. However, it often draws heavily from other fields, including
anthropology Anthropology is the scientific study of humanity, concerned with human behavior, human biology, cultures, societies, and linguistics, in both the present and past, including past human species. Social anthropology studies patterns of be ...
,
economics Economics () is the social science that studies the production, distribution, and consumption of goods and services. Economics focuses on the behaviour and interactions of economic agents and how economies work. Microeconomics analyzes ...
,
geography Geography (from Greek: , ''geographia''. Combination of Greek words ‘Geo’ (The Earth) and ‘Graphien’ (to describe), literally "earth description") is a field of science devoted to the study of the lands, features, inhabitants, an ...
,
law Law is a set of rules that are created and are enforceable by social or governmental institutions to regulate behavior,Robertson, ''Crimes against humanity'', 90. with its precise definition a matter of longstanding debate. It has been vario ...
, philosophy,
sociology Sociology is a social science that focuses on society, human social behavior, patterns of social relationships, social interaction, and aspects of culture associated with everyday life. It uses various methods of empirical investigation an ...
, and
history History (derived ) is the systematic study and the documentation of the human activity. The time period of event before the invention of writing systems is considered prehistory. "History" is an umbrella term comprising past events as well ...
. While international politics has been analyzed since antiquity, international relations did not become a discrete field until 1919, when it was first offered as an undergraduate major by Aberystwyth University in
the United Kingdom The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Europe, off the north-western coast of the continental mainland. It comprises England, Scotland, Wales and North ...
. After the
Second World War World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposi ...
, international relations burgeoned in both importance and scholarship—particularly in North America and Western Europe—partly in response to the
geostrategic Geostrategy, a subfield of geopolitics, is a type of foreign policy guided principally by geographical factors as they inform, constrain, or affect political and military planning. As with all strategies, geostrategy is concerned with matching m ...
concerns of the Cold War. The collapse of the Soviet Union and subsequent rise of
globalization Globalization, or globalisation (English in the Commonwealth of Nations, Commonwealth English; American and British English spelling differences#-ise, -ize (-isation, -ization), see spelling differences), is the process of foreign relation ...
in the late 20th century presaged new theories and evaluations of the rapidly changing international system.


Terminology

''International relations'' or ''international affairs'' is, dependent on the academic institution, either a subdiscipline of political science, or a broader
multidisciplinary Interdisciplinarity or interdisciplinary studies involves the combination of multiple academic disciplines into one activity (e.g., a research project). It draws knowledge from several other fields like sociology, anthropology, psychology, ec ...
field of global politics, law, economics and world history. As a subdiscipline of political science, the focus of IR studies lie on political, diplomatic and security connections between states, as well as the study of modern political world history. In many academic institutions, studies of IR are thus situated in the department of politics/social sciences. This is for example the case in Scandinavia, where international relations are often simply referred to as ''international politics (IP).'' In institutions where ''international relations'' refers to the broader multidisciplinary field of global politics, law, economics and history, the subject may be studied across multiple departments, or be situated in its own department, as is the case at for example the London School of Economics. An undergraduate degree in multidisciplinary international relations may lead to a more specialised master's degree of either international politics, economics, or international law. In the inaugural issue of ''World Politics'', Frederick S. Dunn wrote that IR was about "relations that take place across national boundaries" and "between autonomous political groups in a world system." Dunn wrote that unique elements characterized IR and separated it from other subfields:
international politics is concerned with the special kind of power relationships that exist in a community lacking an overriding authority; international economics deals with trade relations across national boundaries that are complicated by the uncontrolled actions of sovereign states; and international law is law that is based on voluntary acceptance by independent nations.
The terms "International studies" and "
global studies Global studies (GS) is the interdisciplinary study of global macro-processes. Predominant subjects are global politics, economics, and law, as well as ecology, geography, culture, anthropology and ethnography. It distinguishes itself from the rela ...
" have been used by some to refer to a broader multidisciplinary IR field.


History of international relations

Studies of international relations start thousands of years ago; Barry Buzan and Richard Little consider the interaction of ancient Sumerian city-states, starting in 3,500 BC, as the first fully-fledged international system. Analyses of the foreign policies of sovereign city states have been done in ancient times, as in Thycydides' analysis of the causes of the Peloponnesian War between
Athens Athens ( ; el, Αθήνα, Athína ; grc, Ἀθῆναι, Athênai (pl.) ) is both the capital and largest city of Greece. With a population close to four million, it is also the seventh largest city in the European Union. Athens dominates ...
and
Sparta Sparta ( Doric Greek: Σπάρτα, ''Spártā''; Attic Greek: Σπάρτη, ''Spártē'') was a prominent city-state in Laconia, in ancient Greece. In antiquity, the city-state was known as Lacedaemon (, ), while the name Sparta referre ...
, as well as by
Niccolò Machiavelli Niccolò di Bernardo dei Machiavelli ( , , ; 3 May 1469 – 21 June 1527), occasionally rendered in English as Nicholas Machiavel ( , ; see below), was an Italian diplomat, author, philosopher and historian who lived during the Renaissance. ...
in his work '' The Prince,'' where he analyses the foreign policy of the renaissance city state of
Florence Florence ( ; it, Firenze ) is a city in Central Italy and the capital city of the Tuscany Regions of Italy, region. It is the most populated city in Tuscany, with 383,083 inhabitants in 2016, and over 1,520,000 in its metropolitan area.Bilan ...
. The contemporary field of international relations, however, analyses the connections existing between sovereign nation-states. This makes the establishment of the modern state system the natural starting point of international relations history. The establishment of modern sovereign states as fundamental political units traces back to the Peace of Westphalia of 1648 in
Europe Europe is a large peninsula conventionally considered a continent in its own right because of its great physical size and the weight of its history and traditions. Europe is also considered a subcontinent of Eurasia and it is located entirel ...
. During the preceding
Middle Ages In the history of Europe, the Middle Ages or medieval period lasted approximately from the late 5th to the late 15th centuries, similar to the post-classical period of global history. It began with the fall of the Western Roman Empire ...
, European organization of political authority was based on a vaguely hierarchical religious order. Contrary to popular belief, Westphalia still embodied layered systems of sovereignty, especially within the
Holy Roman Empire The Holy Roman Empire was a political entity in Western, Central, and Southern Europe that developed during the Early Middle Ages and continued until its dissolution in 1806 during the Napoleonic Wars. From the accession of Otto I in 962 ...
. More than the Peace of Westphalia, the
Treaty of Utrecht The Peace of Utrecht was a series of peace treaties signed by the belligerents in the War of the Spanish Succession, in the Dutch city of Utrecht between April 1713 and February 1715. The war involved three contenders for the vacant throne ...
of 1713 is thought to reflect an emerging norm that sovereigns had no internal equals within a defined territory and no external superiors as the ultimate authority within the territory's sovereign borders. These principles underpin the modern international legal and political order. The period between roughly 1500 to 1789 saw the rise of independent
sovereign state A sovereign state or sovereign country, is a political entity represented by one central government that has supreme legitimate authority over territory. International law defines sovereign states as having a permanent population, defined te ...
s,
multilateralism In international relations, multilateralism refers to an alliance of multiple countries pursuing a common goal. Definitions Multilateralism, in the form of membership in international institutions, serves to bind powerful nations, discourage ...
, and the institutionalization of
diplomacy Diplomacy comprises spoken or written communication by representatives of states (such as leaders and diplomats) intended to influence events in the international system.Ronald Peter Barston, ''Modern diplomacy'', Pearson Education, 2006, p. ...
and the military. The
French Revolution The French Revolution ( ) was a period of radical political and societal change in France that began with the Estates General of 1789 and ended with the formation of the French Consulate in coup of 18 Brumaire, November 1799. Many of its ...
contributed the idea that the citizenry of a state, defined as the nation, that were sovereign, rather than a monarch or noble class. A state wherein the
nation A nation is a community of people formed on the basis of a combination of shared features such as language, history, ethnicity, culture and/or society. A nation is thus the collective Identity (social science), identity of a group of people unde ...
is sovereign would thence be termed a nation-state, as opposed to a monarchy or a religious state; the term republic increasingly became its synonym. An alternative model of the nation-state was developed in reaction to the French republican concept by the Germans and others, who instead of giving the citizenry sovereignty, kept the princes and nobility, but defined nation-statehood in ethnic-linguistic terms, establishing the rarely if ever fulfilled ideal that all people speaking one language should belong to one state only. The same claim to sovereignty was made for both forms of nation-state. In Europe today, few states conform to either definition of nation-state: many continue to have royal sovereigns, and hardly any are ethnically homogeneous. The particular European system supposing the sovereign equality of states was exported to the Americas, Africa, and Asia via
colonialism Colonialism is a practice or policy of control by one people or power over other people or areas, often by establishing colony, colonies and generally with the aim of economic dominance. In the process of colonisation, colonisers may impose the ...
and the "standards of civilization". The contemporary international system was finally established through
decolonization Decolonization or decolonisation is the undoing of colonialism, the latter being the process whereby imperial nations establish and dominate foreign territories, often overseas. Some scholars of decolonization focus especially on separatism, in ...
during the Cold War. However, this is somewhat over-simplified. While the nation-state system is considered "modern", many states have not incorporated the system and are termed "pre-modern". Further, a handful of states have moved beyond insistence on full sovereignty, and can be considered "post-modern". The ability of contemporary IR discourse to explain the relations of these different types of states is disputed. "Levels of analysis" is a way of looking at the international system, which includes the individual level, the domestic state as a unit, the international level of transnational and intergovernmental affairs, and the global level. What is explicitly recognized as international relations theory was not developed until after
World War I World War I (28 July 1914 11 November 1918), often abbreviated as WWI, was one of the deadliest global conflicts in history. Belligerents included much of Europe, the Russian Empire, the United States, and the Ottoman Empire, with fightin ...
, and is dealt with in more detail below. IR theory, however, has a long tradition of drawing on the work of other
social science Social science is one of the branches of science, devoted to the study of societies and the relationships among individuals within those societies. The term was formerly used to refer to the field of sociology, the original "science of so ...
s. The use of capitalizations of the "I" and "R" in international relations aims to distinguish the academic discipline of international relations from the phenomena of international relations. Many cite
Sun Tzu Sun Tzu ( ; zh, t=孫子, s=孙子, first= t, p=Sūnzǐ) was a Chinese military general, strategist, philosopher, and writer who lived during the Eastern Zhou period of 771 to 256 BCE. Sun Tzu is traditionally credited as the author of '' The ...
's ''
The Art of War ''The Art of War'' () is an ancient Chinese military treatise dating from the Late Spring and Autumn Period (roughly 5th century BC). The work, which is attributed to the ancient Chinese military strategist Sun Tzu ("Master Sun"), is com ...
'' (6th century BC),
Thucydides Thucydides (; grc, , }; BC) was an Athenian historian and general. His '' History of the Peloponnesian War'' recounts the fifth-century BC war between Sparta and Athens until the year 411 BC. Thucydides has been dubbed the father of " scienti ...
' ''
History of the Peloponnesian War The ''History of the Peloponnesian War'' is a historical account of the Peloponnesian War (431–404 BC), which was fought between the Peloponnesian League (led by Sparta) and the Delian League (led by Athens). It was written by Thucydides, an ...
'' (5th century BC),
Chanakya Chanakya (Sanskrit: चाणक्य; IAST: ', ; 375–283 BCE) was an ancient Indian polymath who was active as a teacher, author, strategist, philosopher, economist, jurist, and royal advisor. He is traditionally identified as Kauṭil ...
's '' Arthashastra'' (4th century BC), as the inspiration for realist theory, with Hobbes' ''
Leviathan Leviathan (; he, לִוְיָתָן, ) is a sea serpent noted in theology and mythology. It is referenced in several books of the Hebrew Bible, including Psalms, the Book of Job, the Book of Isaiah, the Book of Amos, and, according to some ...
'' and Machiavelli's '' The Prince'' providing further elaboration. Similarly,
liberalism Liberalism is a political and moral philosophy based on the rights of the individual, liberty, consent of the governed, political equality and equality before the law."political rationalism, hostility to autocracy, cultural distaste for c ...
draws upon the work of
Kant Immanuel Kant (, , ; 22 April 1724 – 12 February 1804) was a German philosopher and one of the central Enlightenment thinkers. Born in Königsberg, Kant's comprehensive and systematic works in epistemology, metaphysics, ethics, and aest ...
and
Rousseau Jean-Jacques Rousseau (, ; 28 June 1712 – 2 July 1778) was a Genevan philosopher, writer, and composer. His political philosophy influenced the progress of the Age of Enlightenment throughout Europe, as well as aspects of the French Revolu ...
, with the work of the former often being cited as the first elaboration of democratic peace theory. Though contemporary human rights is considerably different from the type of rights envisioned under
natural law Natural law ( la, ius naturale, ''lex naturalis'') is a system of law based on a close observation of human nature, and based on values intrinsic to human nature that can be deduced and applied independently of positive law (the express enacte ...
,
Francisco de Vitoria Francisco de Vitoria ( – 12 August 1546; also known as Francisco de Victoria) was a Spanish Roman Catholic philosopher, theologian, and jurist of Renaissance Spain. He is the founder of the tradition in philosophy known as the School of Sala ...
, Hugo Grotius and John Locke offered the first accounts of universal entitlement to certain rights on the basis of common humanity. In the 20th century, in addition to contemporary theories of
liberal internationalism Liberal internationalism is a foreign policy doctrine that argues two main points: first, that international organizations should achieve multilateral agreements between states that uphold rules-based norms and promote liberal democracy, and, se ...
,
Marxism Marxism is a left-wing to far-left method of socioeconomic analysis that uses a materialist interpretation of historical development, better known as historical materialism, to understand class relations and social conflict and a dialectical ...
has been a foundation of international relations.


Emergence as academic discipline

International relations as a distinct field of study began in
Britain Britain most often refers to: * The United Kingdom, a sovereign state in Europe comprising the island of Great Britain, the north-eastern part of the island of Ireland and many smaller islands * Great Britain, the largest island in the United King ...
. IR emerged as a formal
academic discipline An academy (Attic Greek: Ἀκαδήμεια; Koine Greek Ἀκαδημία) is an institution of secondary or tertiary higher learning (and generally also research or honorary membership). The name traces back to Plato's school of philosophy, ...
in 1919 with the founding of the first IR professorship: the Woodrow Wilson Chair at Aberystwyth,
University of Wales , latin_name = , image = , caption = Coat of Arms , motto = cy, Goreu Awen Gwirionedd , mottoeng = The Best Inspiration is Truth , established = , , type = Confederal, non-member ...
(now Aberystwyth University), held by
Alfred Eckhard Zimmern Sir Alfred Eckhard Zimmern (26 January 1879–24 November 1957) was an English classical scholar, historian, and political scientist writing on international relations. A British policymaker during World War I and a prominent liberal thinker, Z ...
and endowed by David Davies. International politics courses were established at the University of Wisconsin in 1899 by Paul Samuel Reinsch and at Columbia University in 1910. By 1920, there were four universities that taught courses on
international organization An international organization or international organisation (see spelling differences), also known as an intergovernmental organization or an international institution, is a stable set of norms and rules meant to govern the behavior of states a ...
.
Georgetown University Georgetown University is a private university, private research university in the Georgetown (Washington, D.C.), Georgetown neighborhood of Washington, D.C. Founded by Bishop John Carroll (archbishop of Baltimore), John Carroll in 1789 as Georg ...
's
Edmund A. Walsh School of Foreign Service Edmund is a masculine given name or surname in the English language. The name is derived from the Old English elements ''ēad'', meaning "prosperity" or "riches", and ''mund'', meaning "protector". Persons named Edmund include: People Kings ...
is the oldest continuously operating school for international affairs in the United States, founded in 1919. In the early 1920s, the
London School of Economics The London School of Economics and Political Science (LSE) is a public university, public research university located in London, England and a constituent college of the federal University of London. Founded in 1895 by Fabian Society members Sidn ...
' department of international relations was founded at the behest of
Nobel Peace Prize The Nobel Peace Prize is one of the five Nobel Prizes established by the will of Swedish industrialist, inventor and armaments (military weapons and equipment) manufacturer Alfred Nobel, along with the prizes in Chemistry, Physics, Physiolog ...
winner
Philip Noel-Baker Philip John Noel-Baker, Baron Noel-Baker, (1 November 1889 – 8 October 1982), born Philip John Baker, was a British politician, diplomat, academic, athlete, and renowned campaigner for disarmament. He carried the British team flag and won a ...
: this was the first institute to offer a wide range of degrees in the field. This was rapidly followed by establishment of IR at universities in the US and in
Geneva , neighboring_municipalities= Carouge, Chêne-Bougeries, Cologny, Lancy, Grand-Saconnex, Pregny-Chambésy, Vernier, Veyrier , website = https://www.geneve.ch/ Geneva ( ; french: Genève ) frp, Genèva ; german: link=no, Genf ; it, Ginevr ...
, Switzerland. The creation of the posts of
Montague Burton Professor of International Relations The Montague Burton Professorship of International Relations is a named chair at the University of Oxford and the London School of Economics and Political Science. Created by the endowment of Montague Burton in UK universities, the Oxford chair w ...
at LSE and at Oxford gave further impetus to the academic study of international relations. Furthermore, the International History department at LSE developed a focus on the history of IR in the early modern,
colonial Colonial or The Colonial may refer to: * Colonial, of, relating to, or characteristic of a colony or colony (biology) Architecture * American colonial architecture * French Colonial * Spanish Colonial architecture Automobiles * Colonial (1920 au ...
and Cold War periods. The first university entirely dedicated to the study of IR was the
Graduate Institute of International and Development Studies The Graduate Institute of International and Development Studies, or the Geneva Graduate Institute (french: Institut de hautes études internationales et du développement), abbreviated IHEID, is a government-accredited postgraduate institution ...
, which was founded in 1927 to form diplomats associated to the
League of Nations The League of Nations (french: link=no, Société des Nations ) was the first worldwide intergovernmental organisation whose principal mission was to maintain world peace. It was founded on 10 January 1920 by the Paris Peace Conference that ...
. In 1922,
Georgetown University Georgetown University is a private university, private research university in the Georgetown (Washington, D.C.), Georgetown neighborhood of Washington, D.C. Founded by Bishop John Carroll (archbishop of Baltimore), John Carroll in 1789 as Georg ...
graduated its first class of the
Master of Science in Foreign Service The Edmund A. Walsh School of Foreign Service (SFS) is the school of international relations at Georgetown University in Washington, D.C. It is considered to be one of the world's leading international affairs schools, granting degrees at bot ...
(MSFS) degree, making it the first international relations graduate program in the United States. This was soon followed by the establishment of the Committee on International Relations (CIR) at the
University of Chicago The University of Chicago (UChicago, Chicago, U of C, or UChi) is a private university, private research university in Chicago, Illinois. Its main campus is located in Chicago's Hyde Park, Chicago, Hyde Park neighborhood. The University of Chic ...
, where the first research
graduate degree Postgraduate or graduate education refers to academic or professional degrees, certificates, diplomas, or other qualifications pursued by post-secondary students who have earned an undergraduate (bachelor's) degree. The organization and struc ...
was conferred in 1928.
The Fletcher School of Law and Diplomacy The Fletcher School of Law and Diplomacy is the graduate school of international affairs of Tufts University, in Medford, Massachusetts. The School is one of America's oldest graduate schools of international relations and is well-ranked in it ...
, a collaboration between Tufts University and Harvard, opened its doors in 1933 as the first graduate-only school of international affairs in the United States. In 1965,
Glendon College Glendon College is a public liberal arts college in Toronto, Ontario, Canada. Formally the federated bilingual campus of York University, it is one of the school's nine colleges and 11 faculties with 100 full-time faculty members and a student po ...
and the
Norman Paterson School of International Affairs The Norman Paterson School of International Affairs (NPSIA ( )) is a professional school of international affairs at Carleton University that was founded in 1965. The school is based at Richcraft Hall on Carleton's campus in Ottawa, Ontario, Ca ...
were the first institutions in Canada to offer an undergraduate and a graduate program in international studies and affairs, respectively. The lines between IR and other political science subfields is sometimes blurred, in particular when it comes to the study of conflict, institutions, political economy and political behavior. The division between comparative politics and international relations is artificial, as processes within nations shape international processes, and international processes shape processes within states. Some scholars have called for an integration of the fields. Comparative politics does not have similar "isms" as international relations scholarship. Critical scholarship in International Relations has explored the relationship between the institutionalization of International Relations as an academic discipline and the demands of national governments. Robert Vitalis's book ''White World Order, Black Power Politics'' details the historical imbrication of IR in the projects of colonial administration and imperialism, while other scholars have traced the emergence of International Relations in relation to the consolidation of newly independent nation-states within the non-West, such as Brazil and India.


Theory

Within the study of international relations, there exists multiple theories seeking to explain how states operate within the international system. These can generally be divided into the three main strands of realism, liberalism, and constructivism.


Realism

The realist framework of international relations rests on the fundamental assumption that the international state system is an anarchy, with no overarching power restricting the behaviour of sovereign states. As a consequence, states are engaged in a continuous power struggle, where they seek to augment their own military capabilities, economic power, and diplomacy relative to other states; this in order to ensure the protection of their political system, citizens, and vital interests. The realist framework further assumes that states act as unitary, rational actors, where central decision makers in the state apparatus ultimately stand for most of the state's foreign policy decisions. International organisations are in consequence merely seen as tools for individual states used to further their own interests, and are thought to have little power in shaping states' foreign policies on their own. The realist framework is traditionally associated with the analysis of power-politics, and has been used to analyse the conflicts between states in the early European state-system; the causes of the first and
second world wars World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposing ...
, as well as the behaviour of the
United States The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territori ...
and the
Soviet Union The Soviet Union,. officially the Union of Soviet Socialist Republics. (USSR),. was a List of former transcontinental countries#Since 1700, transcontinental country that spanned much of Eurasia from 1922 to 1991. A flagship communist state, ...
during the Cold War. In settings such as these the realist framework carries great interpretative insights in explaining how the military and economic power struggles of states lead to larger armed conflicts.


History of realism

''
History of the Peloponnesian War The ''History of the Peloponnesian War'' is a historical account of the Peloponnesian War (431–404 BC), which was fought between the Peloponnesian League (led by Sparta) and the Delian League (led by Athens). It was written by Thucydides, an ...
'', written by
Thucydides Thucydides (; grc, , }; BC) was an Athenian historian and general. His '' History of the Peloponnesian War'' recounts the fifth-century BC war between Sparta and Athens until the year 411 BC. Thucydides has been dubbed the father of " scienti ...
, is considered a foundational text of the realist school of political philosophy. There is debate over whether Thucydides himself was a realist; Richard Ned Lebow has argued that seeing Thucydides as a realist is a misinterpretation of a more complex political message within his work. Amongst others, philosophers like Machiavelli, Hobbes and
Rousseau Jean-Jacques Rousseau (, ; 28 June 1712 – 2 July 1778) was a Genevan philosopher, writer, and composer. His political philosophy influenced the progress of the Age of Enlightenment throughout Europe, as well as aspects of the French Revolu ...
are considered to have contributed to the Realist philosophy. However, while their work may support realist doctrine, it is not likely that they would have classified themselves as realists in this sense.
Political realism Realism is one of the dominant schools of thought in international relations theory, theoretically formalising the Realpolitik statesmanship of early modern Europe. Although a highly diverse body of thought, it is unified by the belief that wor ...
believes that politics, like society, is governed by objective laws with roots in
human nature Human nature is a concept that denotes the fundamental dispositions and characteristics—including ways of thinking, feeling, and acting—that humans are said to have naturally. The term is often used to denote the essence of humankind, or ...
. To improve society, it is first necessary to understand the laws by which society lives. The operation of these laws being impervious to our preferences, persons will challenge them only at the risk of failure. Realism, believing as it does in the objectivity of the laws of politics, must also believe in the possibility of developing a rational theory that reflects, however imperfectly and one-sidedly, these objective laws. It believes also, then, in the possibility of distinguishing in politics between truth and opinion—between what is true objectively and rationally, supported by evidence and illuminated by reason, and what is only a subjective judgment, divorced from the facts as they are and informed by prejudice and wishful thinking. Major theorists include E. H. Carr, Robert Gilpin, Charles P. Kindleberger, Stephen D. Krasner,
Hans Morgenthau Hans Joachim Morgenthau (February 17, 1904 – July 19, 1980) was a German-American jurist and political scientist who was one of the major 20th-century figures in the study of international relations. Morgenthau's works belong to the tradition o ...
, Kenneth Waltz,
Robert Jervis Robert Jervis (April 30, 1940 – December 9, 2021) was an American political scientist who was the Adlai E. Stevenson Professor of International Politics in the Department of Political Science at Columbia University. Jervis was co-editor of the ...
, Stephen Walt, and
John Mearsheimer John Joseph Mearsheimer (; born December 14, 1947) is an American political scientist and international relations scholar, who belongs to the realist school of thought. He is the R. Wendell Harrison Distinguished Service Professor at the Univers ...
.


Liberalism

In contrast to realism, the liberal framework emphasises that states, although they are sovereign, do not exist in a purely anarchical system. Rather, liberal theory assumes that states are institutionally constrained by the power of international organisations, and mutually dependent on one another through economic and diplomatic ties. Institutions such as the
United Nations The United Nations (UN) is an intergovernmental organization whose stated purposes are to maintain international peace and security, develop friendly relations among nations, achieve international cooperation, and be a centre for harmoniz ...
, the World Trade Organisation (WTO), and the
International Court of Justice The International Court of Justice (ICJ; french: Cour internationale de justice, links=no; ), sometimes known as the World Court, is one of the six principal organs of the United Nations (UN). It settles disputes between states in accordanc ...
are taken to, over time, have developed power and influence to shape the foreign policies of individual states. Furthermore, the existence of the globalised world economy makes continuous military power struggle irrational, as states are dependent on participation in the global trade system to ensure their own survival. As such, the liberal framework stresses cooperation between states as a fundamental part of the international system. States are not seen as unitary actors, but pluralistic arenas where interest groups, non-governmental organisations, and economic actors also shape the creation of foreign policy.Mingst, Karen A., & Arreguín-Toft, Ivan M. (2011). Essentials of International Relations (5th ed.). New York: W. W. Norton & Company. The liberal framework is associated with analysis of the globalised world as it emerged in the aftermath of
World War II World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposing ...
. Increased political cooperation through organisations such as the UN, as well as economic cooperation through institutions such as the WTO, the World Bank and the
International Monetary Fund The International Monetary Fund (IMF) is a major financial agency of the United Nations, and an international financial institution, headquartered in Washington, D.C., consisting of 190 countries. Its stated mission is "working to foster glo ...
, was thought to have made the realist analysis of power and conflict inadequate in explaining the workings of the international system.


History of liberalism

The intellectual basis of liberal theory is often cited as Immanuel Kant's essay ''Perpetual Peace'' from 1795. In it, he postulates that states, over time, through increased political and economic cooperation, will come to resemble an international federation—a
world government World government is the concept of a single political authority with jurisdiction over all humanity. It is conceived in a variety of forms, from tyrannical to democratic, which reflects its wide array of proponents and detractors. A world gove ...
; which will be characterised by continual peace and cooperation. In modern times, liberal international relations theory arose after
World War I World War I (28 July 1914 11 November 1918), often abbreviated as WWI, was one of the deadliest global conflicts in history. Belligerents included much of Europe, the Russian Empire, the United States, and the Ottoman Empire, with fightin ...
in response to the ability of states to control and limit war in their international relations. Early adherents include
Woodrow Wilson Thomas Woodrow Wilson (December 28, 1856February 3, 1924) was an American politician and academic who served as the 28th president of the United States from 1913 to 1921. A member of the Democratic Party, Wilson served as the president of ...
and
Norman Angell Sir Ralph Norman Angell (26 December 1872 – 7 October 1967) was an English Nobel Peace Prize winner. He was a lecturer, journalist, author and Member of Parliament for the Labour Party. Angell was one of the principal founders of the Union o ...
, who argued that states mutually gained from cooperation and that war was so destructive as to be essentially futile. Liberalism was not recognized as a coherent theory as such until it was collectively and derisively termed idealism by E. H. Carr. A new version of "idealism" that focused on
human rights Human rights are moral principles or normsJames Nickel, with assistance from Thomas Pogge, M.B.E. Smith, and Leif Wenar, 13 December 2013, Stanford Encyclopedia of PhilosophyHuman Rights Retrieved 14 August 2014 for certain standards of hu ...
as the basis of the legitimacy of
international law International law (also known as public international law and the law of nations) is the set of rules, norms, and standards generally recognized as binding between states. It establishes normative guidelines and a common conceptual framework for ...
was advanced by Hans Köchler. Major theorists include
Montesquieu Charles Louis de Secondat, Baron de La Brède et de Montesquieu (; ; 18 January 168910 February 1755), generally referred to as simply Montesquieu, was a French judge, man of letters, historian, and political philosopher. He is the princi ...
,
Immanuel Kant Immanuel Kant (, , ; 22 April 1724 – 12 February 1804) was a German philosopher and one of the central Enlightenment thinkers. Born in Königsberg, Kant's comprehensive and systematic works in epistemology, metaphysics, ethics, and ...
, Michael W. Doyle,
Francis Fukuyama Francis Yoshihiro Fukuyama (; born October 27, 1952) is an American political scientist, political economist, international relations scholar and writer. Fukuyama is known for his book ''The End of History and the Last Man'' (1992), which argue ...
, and Helen Milner.


Liberal institututionalism

Liberal institutionalism (some times referred to as Neoliberalism) shows how cooperation can be achieved in international relations even if neorealist assumptions apply (states are the key actors in world politics, the international system is anarchic, and states pursue their self interest). Liberal institutionalists highlight the role of international institutions and regimes in facilitating cooperation between states. Prominent neoliberal institutionalists are John Ikenberry, Robert Keohane, and
Joseph Nye Joseph Samuel Nye Jr. (born January 19, 1937) is an American political scientist. He and Robert Keohane co-founded the international relations theory of neoliberalism, which they developed in their 1977 book ''Power and Interdependence''. Togethe ...
. Robert Keohane's 1984 book ''
After Hegemony ''After Hegemony'' (full title: ''After Hegemony: Cooperation and Discord in the World Political Economy'') is a book by Robert Keohane first published in 1984. It is a leading text in the liberal institutionalist international relations scholar ...
'' used insights from the
new institutional economics New Institutional Economics (NIE) is an economic perspective that attempts to extend economics by focusing on the institutions (that is to say the social and legal norms and rules) that underlie economic activity and with analysis beyond earlier ...
to argue that the international system could remain stable in the absence of a hegemon, thus rebutting hegemonic stability theory.


= Regime theory

=
Regime theory Regime theory is a theory within international relations derived from the liberal tradition that argues that international institutions or regimes affect the behavior of states or other international actors. It assumes that cooperation is poss ...
is derived from the liberal tradition that argues that international institutions or regimes affect the behaviour of states (or other international actors). It assumes that cooperation is possible in the anarchic system of states, indeed, regimes are by definition, instances of international cooperation. While realism predicts that conflict should be the norm in international relations, regime theorists say that there is cooperation despite anarchy. Often they cite cooperation in trade, human rights and collective security among other issues. These instances of cooperation are regimes. The most commonly cited definition of regimes comes from Stephen Krasner, who defines regimes as "principles, norms, rules, and decision-making procedures around which actor expectations converge in a given issue-area". Not all approaches to regime theory, however, are liberal or neoliberal; some realist scholars like
Joseph Grieco Joseph M. Grieco is professor of political science at Duke University, in Durham, North Carolina. Within international relations theory he is a neorealist and is a key figure in the debate between neorealists and neoliberals Neoliberalism ...
have developed hybrid theories which take a realist based approach to this fundamentally liberal theory. (Realists do not say cooperation ''never'' happens, just that it is not the norm; it is a difference of degree).


Constructivism

The constructivist framework rests on the fundamental assumption that the international system is built on social constructs; such as
idea In common usage and in philosophy, ideas are the results of thought. Also in philosophy, ideas can also be mental representational images of some object. Many philosophers have considered ideas to be a fundamental ontological category of bei ...
s, norms, and identities. Various political actors, such as state leaders, policy makers, and the leaders of international organisations, are socialised into different roles and systems of norms, which define how the international system operates. The constructivist scholar
Alexander Wendt Alexander Wendt (born 12 June 1958) is an American political scientist who is one of the core social constructivist researchers in the field of international relations, and a key contributor to quantum social science. Wendt and academics such as ...
, in a 1992 article in ''
International Organization An international organization or international organisation (see spelling differences), also known as an intergovernmental organization or an international institution, is a stable set of norms and rules meant to govern the behavior of states a ...
,'' noted in response to realism that "anarchy is what states make of it". By this he means that the anarchic structure that realists claim governs state interaction is in fact a phenomenon that is socially constructed and reproduced by states. Constructivism is part of critical theory, and as such seeks to criticise the assumptions underlying traditional IR theory. Constructivist theory would for example claim that the state leaders of the United States and Soviet Union were socialised into different roles and norms, which can provide theoretical insights to how the conflict between the nations was conducted during the Cold War. E.g., prominent US policy makers frequently spoke of the USSR as an 'evil empire', and thus socialised the US population and state apparatus into an anti-communist sentiment, which defined the norms conducted in US foreign policy. Other constructivist analyses include the discourses on European integration; senior policy-making circles were socialised into ideas of Europe as an historical and cultural community, and therefore sought to construct institutions to integrate European nations into a single political body. Constructivism is also present in the analysis of
international law International law (also known as public international law and the law of nations) is the set of rules, norms, and standards generally recognized as binding between states. It establishes normative guidelines and a common conceptual framework for ...
, where norms of conduct such as the prohibition of
chemical weapon A chemical weapon (CW) is a specialized munition that uses chemicals formulated to inflict death or harm on humans. According to the Organisation for the Prohibition of Chemical Weapons (OPCW), this can be any chemical compound intended as a ...
s,
torture Torture is the deliberate infliction of severe pain or suffering on a person for reasons such as punishment, extracting a confession, interrogational torture, interrogation for information, or intimidating third parties. definitions of tortur ...
, and the protection of civilians in war, are socialised into international organisations, and stipulated into rules. Prominent constructivist IR scholars include Michael Barnett,
Martha Finnemore Martha Finnemore (born 1959) is an American constructivist scholar of international relations, and University Professor at the Elliott School of International Affairs at George Washington University. She is considered among the most influential int ...
, Ted Hopf, Peter Katzenstein, Kathryn Sikkink, and
Alexander Wendt Alexander Wendt (born 12 June 1958) is an American political scientist who is one of the core social constructivist researchers in the field of international relations, and a key contributor to quantum social science. Wendt and academics such as ...
.


Critical theory (post-structuralism)

Post-structuralism theories of international relations (also called ''critical theories'' due to being inherently critical of traditional IR frameworks) developed in the 1980s from postmodernist studies in political science. Post-structuralism explores the deconstruction of concepts traditionally not problematic in IR (such as "power" and "agency") and examines how the construction of these concepts shapes international relations. The examination of "narratives" plays an important part in poststructuralist analysis; for example, feminist poststructuralist work has examined the role that "women" play in global society and how they are constructed in war as "innocent" and "civilians". Rosenberg's article "Why is there no International Historical Sociology" was a key text in the evolution of this strand of international relations theory. Post-structuralism has garnered both significant praise and criticism, with its critics arguing that post-structuralist research often fails to address the real-world problems that international relations studies is supposed to contribute to solving. Constructivist theory (see above) is the most prominent strand of post-structuralism. Other prominent post-structuralist theories are Marxism, dependency theory, feminism, and the theories of the English school. See also ''
Critical international relations theory Critical international relations theory is a diverse set of schools of thought in international relations (IR) that have criticized the theoretical, meta-theoretical and/or political status quo, both in IR theory and in international politics more ...
.''


Marxism

Marxist theories of IR reject the realist/liberal view of state conflict or cooperation; instead focusing on the economic and material aspects. It makes the assumption that the economy trumps other concerns, making economic class the fundamental level of analysis. Marxists view the international system as an integrated capitalist system in pursuit of capital accumulation. Thus,
colonialism Colonialism is a practice or policy of control by one people or power over other people or areas, often by establishing colony, colonies and generally with the aim of economic dominance. In the process of colonisation, colonisers may impose the ...
brought in sources for raw materials and captive markets for exports, while decolonialization brought new opportunities in the form of dependence. A prominent derivative of Marxian thought is
critical international relations theory Critical international relations theory is a diverse set of schools of thought in international relations (IR) that have criticized the theoretical, meta-theoretical and/or political status quo, both in IR theory and in international politics more ...
which is the application of " critical theory" to international relations. Early critical theorists were associated with the Frankfurt School, which followed Marx's concern with the conditions that allow for social change and the establishment of rational institutions. Their emphasis on the "critical" component of theory was derived significantly from their attempt to overcome the limits of positivism. Modern-day proponents such as Andrew Linklater,
Robert W. Cox Robert Warburton Cox (1926 – October 9, 2018) was a Canadian scholar of political science and a former United Nations officer. He was cited as one of the intellectual leaders, along with Susan Strange, of the British School of Internation ...
, and Ken Booth focus on the need for human
emancipation Emancipation generally means to free a person from a previous restraint or legal disability. More broadly, it is also used for efforts to procure economic and social rights, political rights or equality, often for a specifically disenfranch ...
from the nation-state. Hence, it is "critical" of mainstream IR theories that tend to be both positivist and state-centric.


Dependency theory

Further linked in with Marxist theories is
dependency theory Dependency theory is the notion that resources flow from a " periphery" of poor and underdeveloped states to a " core" of wealthy states, enriching the latter at the expense of the former. A central contention of dependency theory is that poor ...
and the core–periphery model, which argue that developed countries, in their pursuit of power, appropriate developing states through international banking, security and trade agreements and unions on a formal level, and do so through the interaction of political and financial advisors, missionaries, relief aid workers, and MNCs on the informal level, in order to integrate them into the capitalist system, strategically appropriating undervalued natural resources and labor hours and fostering economic and political dependence.


Feminism

Feminist IR considers the ways that international politics affects and is affected by both men and women and also at how the core concepts that are employed within the discipline of IR (e.g. war, security, etc.) are themselves gendered. Feminist IR has not only concerned itself with the traditional focus of IR on states, wars, diplomacy and security, but feminist IR scholars have also emphasized the importance of looking at how gender shapes the current global political economy. In this sense, there is no clear cut division between feminists working in IR and those working in the area of International Political Economy (IPE). From its inception, feminist IR has also theorized extensively about men and, in particular, masculinities. Many IR feminists argue that the discipline is inherently masculine in nature. For example, in her article "Sex and Death in the Rational World of Defense Intellectuals" Signs (1988), Carol Cohn claimed that a highly masculinized culture within the defence establishment contributed to the divorcing of war from human emotion. Feminist IR emerged largely from the late 1980s onwards. The end of the Cold War and the re-evaluation of traditional IR theory during the 1990s opened up a space for gendering International Relations. Because feminist IR is linked broadly to the critical project in IR, by and large most feminist scholarship have sought to problematize the politics of knowledge construction within the discipline—often by adopting methodologies of deconstructivism associated with postmodernism/poststructuralism. However, the growing influence of feminist and women-centric approaches within the international policy communities (for example at the World Bank and the United Nations) is more reflective of the liberal feminist emphasis on equality of opportunity for women. Prominent scholars include Carol Cohn, Cynthia Enloe, Sara Ruddick, and J. Ann Tickner.


International society theory (The English school)

International society theory, also called the English School, focuses on the shared norms and values of states and how they regulate international relations. Examples of such norms include diplomacy, order, and
international law International law (also known as public international law and the law of nations) is the set of rules, norms, and standards generally recognized as binding between states. It establishes normative guidelines and a common conceptual framework for ...
. Theorists have focused particularly on humanitarian intervention, and are subdivided between solidarists, who tend to advocate it more, and pluralists, who place greater value in order and sovereignty. Nicholas Wheeler is a prominent solidarist, while
Hedley Bull Hedley Norman Bull (10 June 1932 – 18 May 1985) was Professor of International Relations at the Australian National University, the London School of Economics and the University of Oxford until his death from cancer in 1985. He was Montague ...
and Robert H. Jackson are perhaps the best known pluralists. Some English School theoreticians have used historical cases in order to show the influence that normative frameworks have on the evolution of the international political order at various critical junctures.


Levels of analysis


Systemic level concepts

International relations are often viewed in terms of ''levels of analysis''. The ''systemic level'' concepts are those broad concepts that define and shape an international milieu, characterized by anarchy. Focusing on the systemic level of international relations is often, but not always, the preferred method for neo-realists and other structuralist IR analysts.


Sovereignty

Preceding the concepts of interdependence and dependence, international relations relies on the idea of sovereignty. Described in Jean Bodin's ''Six Books of the Commonwealth'' in 1576, the three pivotal points derived from the book describe sovereignty as being a state, that the sovereign power(s) have absolute power over their territories, and that such a power is only limited by the sovereign's "own obligations towards other sovereigns and individuals". Such a foundation of sovereignty is indicated by a sovereign's obligation to other sovereigns, interdependence and dependence to take place. While throughout world history there have been instances of groups lacking or losing sovereignty, such as African nations prior to decolonization or the occupation of Iraq during the
Iraq War {{Infobox military conflict , conflict = Iraq War {{Nobold, {{lang, ar, حرب العراق (Arabic) {{Nobold, {{lang, ku, شەڕی عێراق ( Kurdish) , partof = the Iraq conflict and the War on terror , image ...
, there is still a need for sovereignty in terms of assessing international relations.


Power

The concept of power in international relations can be described as the degree of resources, capabilities, and influence in international affairs. It is often divided up into the concepts of hard power and soft power, hard power relating primarily to coercive power, such as the use of force, and soft power commonly covering
economics Economics () is the social science that studies the production, distribution, and consumption of goods and services. Economics focuses on the behaviour and interactions of economic agents and how economies work. Microeconomics analyzes ...
,
diplomacy Diplomacy comprises spoken or written communication by representatives of states (such as leaders and diplomats) intended to influence events in the international system.Ronald Peter Barston, ''Modern diplomacy'', Pearson Education, 2006, p. ...
and cultural influence. However, there is no clear dividing line between the two forms of power.


National interest

Perhaps the most significant concept behind that of power and sovereignty,
national interest The national interest is a sovereign state's goals and ambitions (economic, military, cultural, or otherwise), taken to be the aim of government. Etymology The Italian phrase ''ragione degli stati'' was first used by Giovanni della Casa around ...
is a state's action in relation to other states where it seeks to gain advantage or benefits to itself. National interest, whether aspirational or operational, is divided by core/vital and peripheral/non-vital interests. Core or vital interests constitute the things which a country is willing to defend or expand with conflict such as territory, ideology (religious, political, economic), or its citizens. Peripheral or non-vital are interests which a state is willing to compromise. For example, in Germany's annexation of the Sudetenland in 1938 (a part of Czechoslovakia) under the Munich Agreement, Czechoslovakia was willing to relinquish territory which was considered ethnically German in order to preserve its own integrity and sovereignty.


Non-state actors

In the 21st century, the status-quo of the international system is no longer monopolized by states alone. Rather, it is the presence of non-state actors, who autonomously act to implement unpredictable behaviour to the international system. Whether it is transnational corporations,
liberation movements A liberation movement is an organization or political movement leading a rebellion, or a non-violent social movement, against a colonial power or national government, often seeking independence based on a nationalist identity and an anti-imperiali ...
,
non-governmental agencies A non-governmental organization (NGO) or non-governmental organisation (see American and British English spelling differences#-ise, -ize (-isation, -ization), spelling differences) is an organization that generally is formed independent from g ...
, or
international organizations An international organization or international organisation (see spelling differences), also known as an intergovernmental organization or an international institution, is a stable set of norms and rules meant to govern the behavior of states a ...
, these entities have the potential to significantly influence the outcome of any international transaction. Additionally, this also includes the individual person as while the individual is what constitutes the states collective entity, the individual does have the potential to also create unpredicted behaviours. Al-Qaeda, as an example of a non-state actor, has significantly influenced the way states (and non-state actors) conduct international affairs.


Power blocs

The existence of power blocs in international relations is a significant factor related to polarity. During the Cold War, the alignment of several nations to one side or another based on ideological differences or national interests has become an endemic feature of international relations. Unlike prior, shorter-term blocs, the Western and Soviet blocs sought to spread their national ideological differences to other nations. Leaders like US President Harry S. Truman under the
Truman Doctrine The Truman Doctrine is an American foreign policy that pledged American "support for democracies against authoritarian threats." The doctrine originated with the primary goal of containing Soviet geopolitical expansion during the Cold War. It wa ...
believed it was necessary to spread democracy whereas the
Warsaw Pact The Warsaw Pact (WP) or Treaty of Warsaw, formally the Treaty of Friendship, Cooperation and Mutual Assistance, was a collective defense treaty signed in Warsaw, Poland, between the Soviet Union and seven other Eastern Bloc socialist repub ...
under Soviet policy sought to spread communism. After the Cold War, and the dissolution of the ideologically homogeneous Eastern bloc still gave rise to others such as the South-South Cooperation movement.


Polarity

Polarity in international relations refers to the arrangement of power within the international system. The concept arose from bipolarity during the Cold War, with the international system dominated by the conflict between two superpowers, and has been applied retrospectively by theorists. However, the term bipolar was notably used by Stalin who said he saw the international system as a bipolar one with two opposing powerbases and ideologies. Consequently, the international system prior to 1945 can be described as multipolar, with power being shared among great powers. The collapse of the Soviet Union in 1991 had led to unipolarity, with the United States as a sole superpower, although many refuse to acknowledge the fact. China's continued rapid economic growth—it became the world's second-largest economy in 2010—respectable international position, and the power the Chinese Government exerts over its people (consisting of the largest population in the world), resulted in debate over whether China is now a superpower or a possible candidate in the future. However, China's strategic force unable of projecting power beyond its region and its nuclear arsenal of 250 warheads (compared to 7,700 of the United States) mean that the unipolarity will persist in the policy-relevant future. Several theories of international relations draw upon the idea of polarity. The balance of power was a concept prevalent in Europe prior to the
First World War World War I (28 July 1914 11 November 1918), often abbreviated as WWI, was one of the deadliest global conflicts in history. Belligerents included much of Europe, the Russian Empire, the United States, and the Ottoman Empire, with fightin ...
, the thought being that by balancing power blocs it would create stability and prevent war. Theories of the balance of power gained prominence again during the Cold War, being a central mechanism of Kenneth Waltz's neorealism. Here, the concepts of balancing (rising in power to counter another) and bandwagonning (siding with another) are developed. Robert Gilpin's
hegemonic stability theory Hegemonic stability theory (HST) is a theory of international relations, rooted in research from the fields of political science, economics, and history. HST indicates that the international system is more likely to remain stable when a single sta ...
also draws upon the idea of polarity, specifically the state of unipolarity.
Hegemony Hegemony (, , ) is the political, economic, and military predominance of one State (polity), state over other states. In Ancient Greece (8th BC – AD 6th ), hegemony denoted the politico-military dominance of the ''hegemon'' city-state over oth ...
is the preponderance of power at one pole in the international system, and the theory argues this is a stable configuration because of mutual gains by both the dominant power and others in the international system. This is contrary to many neorealist arguments, particularly made by Kenneth Waltz, stating that the end of the Cold War and the state of unipolarity is an unstable configuration that will inevitably change. The case of Gilpin proved to be correct and Waltz's article titled "The Stability of a Bipolar World" was followed in 1999 by William Wohlforth's article titled "The Stability of a Unipolar World". Waltz's thesis can be expressed in
power transition theory Power transition theory is a theory about the nature of war, in relation to the power in international relations. The theory was first published in 1958 by its creator, A.F.K. Organski, in his textbook, ''World Politics'' (1958). Overview Accor ...
, which states that it is likely that a great power would challenge a hegemon after a certain period, resulting in a major war. It suggests that while hegemony can control the occurrence of wars, it also results in the creation of one. Its main proponent,
A. F. K. Organski Abramo Fimo Kenneth Organski (12 May 1923 – 6 March 1998) was Professor of Political Science at the University of Michigan, the founder of Power transition theory and a co-founder of Decision Insights, Inc. His pioneering work spanned several ...
, argued this based on the occurrence of previous wars during British, Portuguese, and Dutch hegemony.


Interdependence

Many advocate that the current international system is characterized by growing interdependence; the mutual responsibility and dependency on others. Advocates of this point to growing
globalization Globalization, or globalisation (English in the Commonwealth of Nations, Commonwealth English; American and British English spelling differences#-ise, -ize (-isation, -ization), see spelling differences), is the process of foreign relation ...
, particularly with international economic interaction. The role of international institutions, and widespread acceptance of a number of operating principles in the international system, reinforces ideas that relations are characterized by interdependence.


Dependency

Dependency theory Dependency theory is the notion that resources flow from a " periphery" of poor and underdeveloped states to a " core" of wealthy states, enriching the latter at the expense of the former. A central contention of dependency theory is that poor ...
is a theory most commonly associated with
Marxism Marxism is a left-wing to far-left method of socioeconomic analysis that uses a materialist interpretation of historical development, better known as historical materialism, to understand class relations and social conflict and a dialectical ...
, stating that a set of core states exploit a set of weaker periphery states for their prosperity. Various versions of the theory suggest that this is either an inevitability (standard dependency theory), or use the theory to highlight the necessity for change (Neo-Marxist).


Systemic tools of international relations

*
Diplomacy Diplomacy comprises spoken or written communication by representatives of states (such as leaders and diplomats) intended to influence events in the international system.Ronald Peter Barston, ''Modern diplomacy'', Pearson Education, 2006, p. ...
is the practice of communication and negotiation between representatives of states. To some extent, all other tools of international relations can be considered the failure of diplomacy. Keeping in mind, the use of other tools are part of the communication and negotiation inherent within diplomacy. Sanctions, force, and adjusting trade regulations, while not typically considered part of diplomacy, are actually valuable tools in the interest of leverage and placement in negotiations. * Sanctions are usually a first resort after the failure of diplomacy, and are one of the main tools used to enforce treaties. They can take the form of diplomatic or economic sanctions and involve the cutting of ties and imposition of barriers to communication or trade. *
War War is an intense armed conflict between states, governments, societies, or paramilitary groups such as mercenaries, insurgents, and militias. It is generally characterized by extreme violence, destruction, and mortality, using regular o ...
, the use of force, is often thought of as the ultimate tool of international relations. A popular definition is that given by
Carl von Clausewitz Carl Philipp Gottfried (or Gottlieb) von Clausewitz (; 1 June 1780 – 16 November 1831) was a Prussian general and military theorist who stressed the "moral", in modern terms meaning psychological, and political aspects of waging war. His mo ...
, with war being "the continuation of politics by other means". There is a growing study into "new wars" involving actors other than states. The study of war in international relations is covered by the disciplines of "
war studies War studies, sometimes called polemology, is the multi-disciplinary study of war. It pertains to the military, diplomatic, philosophical, social, political, psychological or economic dimensions of human conflict. The word ''polemology'' deriv ...
" and " strategic studies". * The mobilization of international shame can also be thought of as a tool of international relations. This is attempting to alter states' actions through ' naming and shaming' at the international level. This is mostly done by the large human rights NGOs such as Amnesty International (for instance when it called Guantanamo Bay a "Gulag"), or
Human Rights Watch Human Rights Watch (HRW) is an international non-governmental organization, headquartered in New York City, that conducts research and advocacy on human rights. The group pressures governments, policy makers, companies, and individual human r ...
. A prominent use of was the
UN Commission on Human Rights The United Nations Commission on Human Rights (UNCHR) was a functional commission within the overall framework of the United Nations from 1946 until it was replaced by the United Nations Human Rights Council in 2006. It was a subsidiary body of ...
1235 procedure, which publicly exposes state's human rights violations. The current
UN Human Rights Council The United Nations Human Rights Council (UNHRC), CDH is a United Nations body whose mission is to promote and protect human rights around the world. The Council has 47 members elected for staggered three-year terms on a regional group basis ...
has yet to use this mechanism. * The allotment of economic and/or diplomatic benefits such as the
European Union The European Union (EU) is a supranational political and economic union of member states that are located primarily in Europe. The union has a total area of and an estimated total population of about 447million. The EU has often been de ...
's enlargement policy; candidate countries are only allowed to join if they meet the
Copenhagen criteria The Copenhagen criteria are the rules that define whether a country is eligible to join the European Union. The criteria require that a state has the institutions to preserve democratic governance and human rights, has a functioning marke ...
. * The mutual exchange of ideas, information, art, music and language among nations through cultural diplomacy has also been recognized by governments as an important tool in the development of international relations.


Unit-level concepts in international relations

As a level of analysis the unit level is often referred to as the state level, as it locates its explanation at the level of the state, rather than the international system.


Regime type

It is often considered that a state's form of government can dictate the way that a state interacts with others in the international relation. Democratic peace theory is a theory that suggests that the nature of
democracy Democracy (From grc, δημοκρατία, dēmokratía, ''dēmos'' 'people' and ''kratos'' 'rule') is a form of government in which people, the people have the authority to deliberate and decide legislation ("direct democracy"), or to choo ...
means that democratic countries will not go to war with each other. The justifications for this are that democracies externalize their norms and only go to war for just causes, and that democracy encourages mutual trust and respect.
Communism Communism (from Latin la, communis, lit=common, universal, label=none) is a far-left sociopolitical, philosophical, and economic ideology and current within the socialist movement whose goal is the establishment of a communist society, a ...
justifies a world revolution, which similarly would lead to peaceful coexistence, based on a proletarian global society.


Revisionism versus status quo

States can be classified by whether they accept the international status quo, or are revisionist—i.e., want change. Revisionist states seek to fundamentally change the rules and practices of international relations, feeling disadvantaged by the status quo. They see the international system as a largely western creation which serves to reinforce current realities. Japan is an example of a state that has gone from being a revisionist state to one that is satisfied with the status quo, because the status quo is now beneficial to it.


Religion

Religion can have an effect on the way a state acts within the international system, and different theoretical perspectives treat it in somewhat different fashion. One dramatic example is the
Thirty Years' War The Thirty Years' War was one of the longest and most destructive conflicts in European history, lasting from 1618 to 1648. Fought primarily in Central Europe, an estimated 4.5 to 8 million soldiers and civilians died as a result of battle ...
(1618–48) that ravaged much of Europe, which was at least partly motivated by theological differences within Christianity. Religion is a major organizing principle particularly for
Islamic state An Islamic state is a state that has a form of government based on Islamic law (sharia). As a term, it has been used to describe various historical polities and theories of governance in the Islamic world. As a translation of the Arabic term ...
s, whereas secularism sits at the other end of the spectrum, with the separation of state and religion being responsible for the liberal international relations theory. The
September 11 attacks The September 11 attacks, commonly known as 9/11, were four coordinated suicide terrorist attacks carried out by al-Qaeda against the United States on Tuesday, September 11, 2001. That morning, nineteen terrorists hijacked four commer ...
in the United States, the role of Islam in
terrorism Terrorism, in its broadest sense, is the use of criminal violence to provoke a state of terror or fear, mostly with the intention to achieve political or religious aims. The term is used in this regard primarily to refer to intentional violen ...
, and religious strife in the
Middle East The Middle East ( ar, الشرق الأوسط, ISO 233: ) is a geopolitical region commonly encompassing Arabia (including the Arabian Peninsula and Bahrain), Asia Minor (Asian part of Turkey except Hatay Province), East Thrace (Europ ...
have made the role of religion in international relations a major topic. China's reemergence as a major international power is believed by some scholars to be shaped by
Confucianism Confucianism, also known as Ruism or Ru classicism, is a system of thought and behavior originating in ancient China. Variously described as tradition, a philosophy, a religion, a humanistic or rationalistic religion, a way of governing, or a ...
.


Individual or sub-unit level concepts

The level beneath that of the unit (state) can be useful both for explaining factors in international relations that other theories fail to explain, and for moving away from a state-centric view of international relations. * Psychological factors in international relationsUnderstanding a state is not a "black box" as proposed by realism, and that there may be other influences on foreign policy decisions. Examining the role of personalities in the decision making process can have some explanatory power, as can the role of misperception between various actors. A prominent application of sub-unit level psychological factors in international relations is the concept of
Groupthink Groupthink is a psychological phenomenon that occurs within a group of people in which the desire for harmony or conformity in the group results in an irrational or dysfunctional decision-making outcome. Cohesiveness, or the desire for cohesiveness ...
, another is the propensity of policymakers to think in terms of analogies. * Bureaucratic politicsLooks at the role of the bureaucracy in decision-making, and sees decisions as a result of bureaucratic infighting, and as having been shaped by various constraints. * Religious, ethnic, and secessionist groupsViewing these aspects of the sub-unit level has explanatory power with regards to ethnic conflicts,
religious wars A religious war or a war of religion, sometimes also known as a holy war ( la, sanctum bellum), is a war which is primarily caused or justified by differences in religion. In the modern period, there are frequent debates over the extent to wh ...
, transnational diaspora ( diaspora politics) and other actors which do not consider themselves to fit with the defined state boundaries. This is particularly useful in the context of the pre-modern world of weak states. * Science, technology and international relationsHow science and technology impact global health, business, environment, technology, and development. * International political economy, and economic factors in international relations * International political culturologyLooks at how culture and cultural variables impact in international relations * Personal relations between leaders


Institutions in international relations

International institutions form a vital part of contemporary international relations.


Generalist inter-state organizations


United Nations

The
United Nations The United Nations (UN) is an intergovernmental organization whose stated purposes are to maintain international peace and security, develop friendly relations among nations, achieve international cooperation, and be a centre for harmoniz ...
(UN) is an
international organization An international organization or international organisation (see spelling differences), also known as an intergovernmental organization or an international institution, is a stable set of norms and rules meant to govern the behavior of states a ...
that describes itself as a "global association of
governments A government is the system or group of people governing an organized community, generally a state. In the case of its broad associative definition, government normally consists of legislature, executive, and judiciary. Government is a ...
facilitating co-operation in
international law International law (also known as public international law and the law of nations) is the set of rules, norms, and standards generally recognized as binding between states. It establishes normative guidelines and a common conceptual framework for ...
, international security,
economic development In the economics study of the public sector, economic and social development is the process by which the economic well-being and quality of life of a nation, region, local community, or an individual are improved according to targeted goals and ...
, and social equity"; It is the most prominent international institution. Many of the legal institutions follow the same organizational structure as the UN.


Organisation of Islamic Cooperation

The
Organisation of Islamic Cooperation An organization or organisation (Commonwealth English; see spelling differences), is an entity—such as a company, an institution, or an association—comprising one or more people and having a particular purpose. The word is derived from ...
(OIC) is an
international organization An international organization or international organisation (see spelling differences), also known as an intergovernmental organization or an international institution, is a stable set of norms and rules meant to govern the behavior of states a ...
consisting of 57 member states. The organisation attempts to be the collective voice of the
Muslim world The terms Muslim world and Islamic world commonly refer to the Islamic community, which is also known as the Ummah. This consists of all those who adhere to the religious beliefs and laws of Islam or to societies in which Islam is practiced. I ...
(Ummah) and attempts to safeguard the interests and ensure the progress and well-being of
Muslims Muslims ( ar, المسلمون, , ) are people who adhere to Islam, a monotheistic religion belonging to the Abrahamic tradition. They consider the Quran, the foundational religious text of Islam, to be the verbatim word of the God of Abrah ...
.


Other

Other generalist inter-state organizations include:


Regional security arrangements


Economic institutions


International legal bodies


Human rights


Legal


See also

* Cold War, 1947 to 1991 *
Comparative politics Comparative politics is a field in political science characterized either by the use of the ''comparative method'' or other empirical methods to explore politics both within and between countries. Substantively, this can include questions relatin ...
*
Diplomatic history Diplomatic history deals with the history of international relations between states. Diplomatic history can be different from international relations in that the former can concern itself with the foreign policy of one state while the latter deals ...
**
Diplomatic history of World War I The diplomatic history of World War I covers the non-military interactions among the major players during World War I. For the domestic histories of participants see home front during World War I. For a longer-term perspective see international re ...
** Diplomatic history of World War II * The European Institute for International Law and International Relations *
Extraterritoriality In international law, extraterritoriality is the state of being exempted from the jurisdiction of local law, usually as the result of diplomatic negotiations. Historically, this primarily applied to individuals, as jurisdiction was usually cl ...
* International community * International order *
List of international relations institutes and organisations {{main, International relations Associations *Association of Professional Schools of International Affairs (APSIA) * Global Studies Consortium *International Studies Association * The Jadavpur Association of International Relations * Swedish Associ ...
*
List of international relations journals The following list of scholarly journals in international relations contains notable academic journals on international relations. It is not comprehensive, as there are hundreds currently published. Popular magazines or other publications related t ...
*
Multilateralism In international relations, multilateralism refers to an alliance of multiple countries pursuing a common goal. Definitions Multilateralism, in the form of membership in international institutions, serves to bind powerful nations, discourage ...
* Peace and conflict studies *
Peace economics Peace economics is a branch of conflict economicsSilwal, Shikha B., Charles H. Anderton, Jurgen Brauer, Christopher J. Coyne, and J. Paul Dunne. (2021). The Economics of Conflict and Peace: History and Applications. Cambridge, UK: Cambridge Univer ...
* Political geography * Periods in international relations ** International relations (1648–1814) ** International relations (1814–1919) ** International relations (1919–1939) ** International relations since 1989


References


Bibliography

* * Dyvik, Synne L., Jan Selby and Rorden Wilkinson, eds. ''What's the Point of International Relations'' (2017) * * Reus-Smit, Christian, and Duncan Snidal, eds. ''The Oxford Handbook of International Relations'' (2010)


Theory

*
Norman Angell Sir Ralph Norman Angell (26 December 1872 – 7 October 1967) was an English Nobel Peace Prize winner. He was a lecturer, journalist, author and Member of Parliament for the Labour Party. Angell was one of the principal founders of the Union o ...
''The Great Illusion'' (London: Heinemann, 1910) *
Hedley Bull Hedley Norman Bull (10 June 1932 – 18 May 1985) was Professor of International Relations at the Australian National University, the London School of Economics and the University of Oxford until his death from cancer in 1985. He was Montague ...
''Anarchical Society'' (New York: Columbia University Press, 1977) * E. H. Carr ''
The Twenty Years' Crisis ''The Twenty Years' Crisis: 1919–1939: An Introduction to the Study of International Relations'' is a book on international relations written by E. H. Carr. The book was written in the 1930s shortly before the outbreak of World War&nb ...
'' (2001) 939(New York: Perennial) * Robert Cooper ''The Post-Modern State'' * Enloe, Cynthia. "'Gender' Is Not Enough: The Need for a Feminist Consciousness". ''International Affairs'' 80.1 (2004): 95–97. Web. 17 Sept. 2013. * Goodin, Robert E., and Hans-Dieter Klingemann, eds. ''A New Handbook of Political Science'' (1998) ch 16–19 pp 401–78 * Charlotte Hooper "Masculinities, IR and the 'Gender Variable': A Cost-Benefit Analysis for (Sympathetic) Gender Sceptics." ''International Studies'' 25.3 (1999): 475–491. *
Andrew Hurrell Andrew Hurrell, FBA was the Montague Burton Professor of International Relations and a Fellow of Balliol College, Oxford. He was educated at Gresham's School, Holt, Norfolk. He was previously a Faculty Fellow in International Relations at Nuffie ...
''On Global Order: Power, Values, and the Constitution of International Society'' (Oxford University Press, 2008)
On Global Order: Power, Values, and the Constitution of International Society
* Robert Keohane ''After Hegemony'' * Hans Köchler, ''Democracy and the International Rule of Law''. Vienna/New York: Springer, 1995 * Andrew Linklater ''Men and citizens in the theory of international relations'' *
Donald Markwell Donald John Markwell (born 19 April 1959) is an Australian social scientist, who has been described as a "renowned Australian educational reformer". He was appointed Head of St Mark's College, Adelaide, from November 2019. He was Senior Adviser ...
'' John Maynard Keynes and International Relations: Economic Paths to War and Peace'' (Oxford: Oxford University Press, 2006). * Hans J. Morgenthau ''
Scientific Man Vs. Power Politics ''Scientific Man versus Power Politics'' is a 1946 work by realist academic Hans Morgenthau Hans Joachim Morgenthau (February 17, 1904 – July 19, 1980) was a German-American jurist and political scientist who was one of the major 20th-century ...
'' (Chicago: University of Chicago Press, 1946) *
Reinhold Niebuhr Karl Paul Reinhold Niebuhr (June 21, 1892 – June 1, 1971) was an American Reformed theologian, ethicist, commentator on politics and public affairs, and professor at Union Theological Seminary for more than 30 years. Niebuhr was one of Ameri ...
''
Moral Man and Immoral Society ''Moral Man and Immoral Society: A Study in Ethics and Politics'' is a 1932 book by Reinhold Niebuhr, an American Protestant theologian at Union Theological Seminary (UTS) in New York City. The thesis of the book is that people are more likely to ...
'' 1932 *
Joseph Nye Joseph Samuel Nye Jr. (born January 19, 1937) is an American political scientist. He and Robert Keohane co-founded the international relations theory of neoliberalism, which they developed in their 1977 book ''Power and Interdependence''. Togethe ...
''Soft Power: The Means to Success in World Politics'', Public Affairs Ltd 2004 *
Paul Raskin Paul Raskin is the founding President of the Tellus Institute, which has conducted over 3,500 research and policy projects throughout the world on environmental issues, resource planning, scenario analysis, and sustainable development. His research ...
''The Great Transition Today: A Report from the Future'' * Benno Teschke The Myth of 1648 (New York: Verso Press, 2003). * J. Ann Tickner ''Gender in International Relations'' (New York: Columbia University Press, 1992). * Kenneth Waltz ''Man, the State, and War'' * Kenneth Waltz ''Theory of International Politics'' (1979), examines the foundation of By Bar * Michael Walzer ''Just and Unjust Wars'' 1977 *
Alexander Wendt Alexander Wendt (born 12 June 1958) is an American political scientist who is one of the core social constructivist researchers in the field of international relations, and a key contributor to quantum social science. Wendt and academics such as ...
''Social Theory of International Politics'' 1999 * J. Martin Rochester ''Fundamental Principles of International Relations'' (Westview Press, 2010) * ''An Introduction to International Relations Theory'' * James C. Hsiang ''Anarchy & Order: The Interplay of Politics and Law in International Relations'' 1555875718, 9781555875718 Lynne Rienner Pub 1997


Textbooks


History of international relations


External links

*
The European Institute for International Law and International Relations

La Paz International Relations Foundation
{{DEFAULTSORT:International Relations Politics