A political party is an organization that coordinates
candidate
A candidate, or nominee, is the prospective recipient of an award or honor, or a person seeking or being considered for some kind of position; for example:
* to be elected to an office — in this case a candidate selection procedure occurs.
* ...
s to compete in a particular country's
election
An election is a formal group decision-making process by which a population chooses an individual or multiple individuals to hold public office.
Elections have been the usual mechanism by which modern representative democracy has opera ...
s. It is common for the members of a party to hold similar ideas about politics, and parties may promote specific
ideological
An ideology is a set of beliefs or philosophies attributed to a person or group of persons, especially those held for reasons that are not purely epistemic, in which "practical elements are as prominent as theoretical ones." Formerly applied pri ...
or
policy
Policy is a deliberate system of guidelines to guide decisions and achieve rational outcomes. A policy is a statement of intent and is implemented as a procedure or protocol. Policies are generally adopted by a governance body within an orga ...
goals.
Political parties have become a major part of the politics of almost every country, as modern party organizations developed and spread around the world over the last few centuries. It is extremely rare for a country to have
no political parties. Some countries have
only one political party while others have
several. Parties are important in the politics of
autocracies as well as
democracies
Democracy (From grc, δημοκρατία, dēmokratía, ''dēmos'' 'people' and ''kratos'' 'rule') is a form of government in which the people have the authority to deliberate and decide legislation (" direct democracy"), or to choose g ...
, though usually democracies have more political parties than autocracies. Autocracies often have a single party that governs the country, and some
political scientist
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 ...
s consider competition between two or more parties to be an essential part of democracy.
Parties can develop from existing divisions in society, like the divisions between lower and upper
classes, and they streamline the process of making political decisions by encouraging their members to cooperate. Political parties usually include a party leader, who has primary responsibility for the activities of the party; party executives, who may select the leader and who perform administrative and organizational tasks; and party members, who may volunteer to help the party, donate money to it, and vote for its candidates. There are many different ways in which political parties can be structured and interact with the electorate. The contributions that citizens give to political parties are often regulated by law, and parties will sometimes govern in a way that favours the people who donate time and money to them.
Many political parties are motivated by ideological goals. It is common for democratic elections to feature competitions between
liberal,
conservative
Conservatism is a cultural, social, and political philosophy that seeks to promote and to preserve traditional institutions, practices, and values. The central tenets of conservatism may vary in relation to the culture and civilization in ...
, and
socialist
Socialism is a left-wing economic philosophy and movement encompassing a range of economic systems characterized by the dominance of social ownership of the means of production as opposed to private ownership. As a term, it describes the ...
parties; other common ideologies of
very large political parties include
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 ...
,
populism
Populism refers to a range of political stances that emphasize the idea of "the people" and often juxtapose this group against " the elite". It is frequently associated with anti-establishment and anti-political sentiment. The term develope ...
,
nationalism
Nationalism is an idea and movement that holds that the nation should be congruent with the State (polity), state. As a movement, nationalism tends to promote the interests of a particular nation (as in a in-group and out-group, group of peo ...
, and
Islamism. Political parties in different countries will often adopt similar colours and symbols to identify themselves with a particular ideology. However, many political parties have no ideological affiliation, and may instead be primarily engaged in
patronage,
clientelism
Clientelism or client politics is the exchange of goods and services for political support, often involving an implicit or explicit Quid pro quo, quid-pro-quo. It is closely related to patronage politics and vote buying. Clientelism involves an as ...
, or the advancement of a specific
political entrepreneur The term political entrepreneur may refer to any of the following:
* Someone (usually active in the fields of either politics or business) who founds a new political project, group, or political party
* A businessman who seeks to gain profit thro ...
.
Definition
Political parties are collective entities that organize competitions for political offices.
The members of a political party contest elections under a shared label. In a narrow definition, a political party can be thought of as just the group of candidates who run for office under a party label.
In a broader definition, political parties are the entire apparatus that supports the election of a group of candidates, including voters and volunteers who
identify with a particular political party, the official party organizations that support the election of that party's candidates, and legislators in the government who are affiliated with the party. In many countries, the notion of a political party is defined in law, and governments may specify requirements for an organization to legally qualify as a political party.
According to
Anson D. Morse, a political party is a durable organization united by common principles which "has for its immediate end the advancement of the interests and the realization of the ideals... of the particular group or groups which it represents."
Political parties are distinguished from other political groups and clubs, such as political factions or
interest groups
An interest group or an advocacy group is a body which uses various forms of advocacy in order to influence public opinion and/or policy.
Interest group may also refer to:
* Learned society
* Special interest group, a group of individuals sharin ...
, mostly by the fact that parties are focused on electing candidates, whereas interest groups are focused on advancing a policy agenda. This is related to other features that sometimes distinguish parties from other political organizations, including a larger membership, greater stability over time, and a deeper connection to the electorate.
History
The idea of people forming large groups or factions to advocate for their shared interests is ancient.
Plato
Plato ( ; grc-gre, Πλάτων ; 428/427 or 424/423 – 348/347 BC) was a Greek philosopher born in Athens during the Classical period in Ancient Greece. He founded the Platonist school of thought and the Academy, the first institutio ...
mentions the political factions of
Classical Athens
The city of Athens ( grc, Ἀθῆναι, ''Athênai'' .tʰɛ̂ː.nai̯ Modern Greek: Αθήναι, ''Athine'' or, more commonly and in singular, Αθήνα, ''Athina'' .'θi.na during the classical period of ancient Greece (480–323 BC) wa ...
in the ''
Republic'', and
Aristotle
Aristotle (; grc-gre, Ἀριστοτέλης ''Aristotélēs'', ; 384–322 BC) was a Greek philosopher and polymath during the Classical Greece, Classical period in Ancient Greece. Taught by Plato, he was the founder of the Peripatet ...
discusses the tendency of different types of government to produce factions in the ''
Politics
Politics (from , ) is the set of activities that are associated with making decisions in groups, or other forms of power relations among individuals, such as the distribution of resources or status. The branch of social science that stud ...
''. Certain ancient disputes were also factional, like the
Nika riots between two
chariot racing
Chariot racing ( grc-gre, ἁρματοδρομία, harmatodromia, la, ludi circenses) was one of the most popular ancient Greek, Roman, and Byzantine sports. In Greece, chariot racing played an essential role in aristocratic funeral games ...
factions at the
Hippodrome of Constantinople
Sultanahmet Square ( tr, Sultanahmet Meydanı) or the Hippodrome of Constantinople ( el, Ἱππόδρομος τῆς Κωνσταντινουπόλεως, Hippódromos tēs Kōnstantinoupóleōs; la, Circus Maximus Constantinopolitanus; t ...
. A few instances of recorded political groups or factions in history included the late
Roman Republic's ''
Populares'' and ''
Optimates'' factions as well as the
Dutch Republic's ''
Orangists'' and the ''
Staatsgezinde''. However, modern political parties are considered to have emerged around the end of the 18th century; they are usually considered to have first appeared in Europe and the United States of America, with the
United Kingdom's
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 ...
Conservative Party and the
Democratic Party Democratic Party most often refers to:
*Democratic Party (United States)
Democratic Party and similar terms may also refer to:
Active parties Africa
*Botswana Democratic Party
*Democratic Party of Equatorial Guinea
*Gabonese Democratic Party
*Demo ...
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 U.S. state, states, a Washington, D.C., federal district, five ma ...
both frequently called the world's "oldest continuous political party".
Before the development of mass political parties, elections typically featured a much lower level of competition, had small enough
polities that
direct decision-making was feasible, and held elections that were dominated by individual networks or cliques that could independently propel a candidate to victory in an election.
18th century

Some scholars argue that the first modern political parties developed in
early modern Britain
Early modern Britain is the history of the island of Great Britain roughly corresponding to the 16th, 17th and 18th centuries. Major historical events in early modern British history include numerous wars, especially with France, along with the E ...
in the 18th century, after the
Exclusion Crisis and the
Glorious Revolution.
The
Whig faction originally organized itself around support for Protestant
constitutional monarchy
A constitutional monarchy, parliamentary monarchy, or democratic monarchy is a form of monarchy in which the monarch exercises their authority in accordance with a constitution and is not alone in decision making. Constitutional monarchies di ...
as opposed to
absolute rule, whereas the conservative
Tory
A Tory () is a person who holds a political philosophy known as Toryism, based on a British version of traditionalism and conservatism, which upholds the supremacy of social order as it has evolved in the English culture throughout history. The ...
faction (originally the
Royalist
A royalist supports a particular monarch as head of state for a particular kingdom, or of a particular dynastic claim. In the abstract, this position is royalism. It is distinct from monarchism, which advocates a monarchical system of governm ...
or
Cavalier
The term Cavalier () was first used by Roundheads as a term of abuse for the wealthier royalist supporters of King Charles I and his son Charles II of England during the English Civil War, the Interregnum, and the Restoration (1642 – ). It ...
faction of the
English Civil War
The English Civil War (1642–1651) was a series of civil wars and political machinations between Parliamentarians ("Roundheads") and Royalists led by Charles I ("Cavaliers"), mainly over the manner of Kingdom of England, England's governanc ...
) supported a strong monarchy, and these two groups structured disputes in the politics of 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 European mainland, continental mainland. It comprises England, Scotlan ...
throughout the 18th century
The
Rockingham Whigs have been identified as the first modern political party, because they retained a coherent party label and motivating principles even while out of power.
At the end of the century, the United States also developed a party system, called the
First Party System
The First Party System is a model of American politics used in history and political science to periodize the political party system that existed in the United States between roughly 1792 and 1824. It featured two national parties competing for ...
. Although the framers of the 1787
United States Constitution did not all anticipate that American political disputes would be primarily organized around political parties, political controversies in the early 1790s over the extent of federal government powers saw the
emergence of two proto-political parties: the
Federalist Party
The Federalist Party was a conservative political party which was the first political party in the United States. As such, under Alexander Hamilton, it dominated the national government from 1789 to 1801.
Defeated by the Jeffersonian Repub ...
and the
Democratic-Republican Party
The Democratic-Republican Party, known at the time as the Republican Party and also referred to as the Jeffersonian Republican Party among other names, was an American political party founded by Thomas Jefferson and James Madison in the early ...
.
19th century
By the early 19th century, a number of countries had developed stable modern party systems. The party system that developed in Sweden has been called the world's first party system, on the basis that previous party systems were not fully stable or institutionalized.
In many European countries, including Belgium, Switzerland, Germany, and France, political parties organized around a
liberal-
conservative
Conservatism is a cultural, social, and political philosophy that seeks to promote and to preserve traditional institutions, practices, and values. The central tenets of conservatism may vary in relation to the culture and civilization in ...
divide, or around religious disputes.
[ The spread of the party model of politics was accelerated by the ]1848 Revolution
The Revolutions of 1848, known in some countries as the Springtime of the Peoples or the Springtime of Nations, were a series of political upheavals throughout Europe starting in 1848. It remains the most widespread revolutionary wave in Europea ...
s around Europe.
The strength of political parties in the United States waned during the Era of Good Feelings, but shifted and strengthened again by the second half of the 19th century. This was not the only country in which the strength of political parties had substantially increased by the end of the century; for example, around this time the Irish political leader Charles Stewart Parnell
Charles Stewart Parnell (27 June 1846 – 6 October 1891) was an Irish nationalist politician who served as a Member of Parliament (MP) from 1875 to 1891, also acting as Leader of the Home Rule League from 1880 to 1882 and then Leader of th ...
implemented several methods and structures like party discipline that would come to be associated with strong grassroots
A grassroots movement is one that uses the people in a given district, region or community as the basis for a political or economic movement. Grassroots movements and organizations use collective action from the local level to effect change at t ...
political parties.
20th century
At the beginning of the 20th century in Europe, the liberal–conservative divide that characterized most party systems was disrupted by the emergence of socialist
Socialism is a left-wing economic philosophy and movement encompassing a range of economic systems characterized by the dominance of social ownership of the means of production as opposed to private ownership. As a term, it describes the ...
parties, which attracted the support of organized trade union
A trade union (labor union in American English), often simply referred to as a union, is an organization of workers intent on "maintaining or improving the conditions of their employment", ch. I such as attaining better wages and benefits (s ...
s.[
During the wave of ]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 ...
in the mid-20th century, many newly sovereign countries outside of Europe and North America developed party systems that often emerged from their movements for independence. For example, a system of political parties arose out of factions in the Indian independence movement
The Indian independence movement was a series of historic events with the ultimate aim of ending British Raj, British rule in India. It lasted from 1857 to 1947.
The first nationalistic revolutionary movement for Indian independence emerged ...
, and was strengthened and stabilized by the policies of Indira Gandhi in the 1970s. The formation of the Indian National Congress
The Indian National Congress (INC), colloquially the Congress Party but often simply the Congress, is a political party in India with widespread roots. Founded in 1885, it was the first modern nationalist movement to emerge in the British ...
, which developed in the early 20th century as a pro-independence faction in British India
The provinces of India, earlier presidencies of British India and still earlier, presidency towns, were the administrative divisions of British governance on the Indian subcontinent. Collectively, they have been called British India. In one ...
and immediately became a major political party after Indian independence, foreshadowed the dynamic in many newly independent countries; for example, the Uganda National Congress was a pro-independence party and the first political party in Uganda, and its name was chosen as an homage to the Indian National Congress.
As broader suffrage rights and eventually universal suffrage
Universal suffrage (also called universal franchise, general suffrage, and common suffrage of the common man) gives the right to vote to all adult citizens, regardless of wealth, income, gender, social status, race, ethnicity, or political sta ...
slowly spread throughout democracies, political parties expanded dramatically, and only then did a vision develop of political parties as intermediaries between the full public and the government.
Causes of political parties
Political parties are a nearly ubiquitous feature of modern countries. Nearly all democratic countries have strong political parties, and many political scientists consider countries with fewer than two parties to necessarily be autocratic
Autocracy is a system of government in which absolute power over a state is concentrated in the hands of one person, whose decisions are subject neither to external legal restraints nor to regularized mechanisms of popular control (except perh ...
. However, these sources allow that a country with multiple competitive parties is not necessarily democratic, and the politics of many autocratic countries are organized around one dominant political party. The ubiquity and strength of political parties in nearly every modern country has led researchers to remark that the existence of political parties is almost a law of politics, and to ask why parties appear to be such an essential part of modern states. Political scientists have therefore come up with several explanations for why political parties are a nearly universal political phenomenon.
Social cleavages
One of the core explanations for the existence of political parties is that they arise from pre-existing divisions among people: society is divided in a certain way, and a party is formed to organize that division into the electoral competition. By the 1950s, economists and political scientists had shown that party organizations could take advantage of the distribution of voters' preferences over political issues, adjusting themselves in response to what voters believe in order to become more competitive. Beginning in the 1960s, academics began identifying the social cleavages in different countries that might have given rise to specific parties, such as religious cleavages in specific countries that may have produced religious parties there.
The theory that parties are produced by social cleavages has drawn several criticisms. Some authors have challenged it on empirical grounds, either finding no evidence for the claim that parties emerge from existing cleavages, or arguing that the claim is not empirically testable. Others note that while social cleavages might cause political parties to exist, this obscures the opposite effect: that political parties also cause changes in the underlying social cleavages. A further objection is that, if the explanation for where parties come from is that they emerge from existing social cleavages, then the theory is an incomplete story of where political parties come from unless it also explains the origins of these social cleavages.
Individual and group incentives
An alternative explanation for why parties are ubiquitous across the world is that the formation of parties provides compatible incentives for candidates and legislators. For example, the existence of political parties might coordinate candidates across geographic districts, so that a candidate in one electoral district has an incentive to assist a similar candidate in a different district. Thus, political parties can be mechanisms for preventing candidates with similar goals from acting to each other's detriment when campaigning or governing. This might help explain the ubiquity of parties: if a group of candidates form a party and are harming each other less, they may perform better over the long run than unaffiliated politicians, so politicians with party affiliations will out-compete politicians without parties.
Parties can also align their member's incentives when those members are in a legislature. The existence of a party apparatus can help coalitions of electors to agree on ideal policy choices, whereas a legislature of unaffiliated members might never be able to agree on a single best policy choice without some institution constraining their options.
Parties as heuristics
Another prominent explanation for why political parties exist is psychological: parties may be necessary for many individuals to participate in politics because they provide a massively simplifying heuristic
A heuristic (; ), or heuristic technique, is any approach to problem solving or self-discovery that employs a practical method that is not guaranteed to be optimal, perfect, or rational, but is nevertheless sufficient for reaching an immediat ...
, which allows people to make informed choices with much less mental effort than if voters had to consciously evaluate the merits of every candidate individually. Without political parties, electors would have to individually evaluate every candidate in every election. But political parties enable electors to make judgments about just a few groups, and then apply their judgment of the party to all the candidates affiliated with that group. Because it is much easier to become informed about a few parties' platforms than about many candidates' personal positions, parties reduce the cognitive burden for people to cast informed votes. However, evidence suggests that over the last several decades, the strength of party identification has been weakening, so this may be a less important function for parties to provide than it was in the past.
Structure of political parties
Political parties are often structured in similar ways across countries. They typically feature a single party leader, a group of party executives, and a community of party members.[ Parties in democracies usually select their party leadership in ways that are more open and competitive than parties in autocracies, where the selection of a new party leader is likely to be tightly controlled.][ In countries with large sub-national regions, particularly ]federalist
The term ''federalist'' describes several political beliefs around the world. It may also refer to the concept of parties, whose members or supporters called themselves ''Federalists''.
History Europe federation
In Europe, proponents of de ...
countries, there may be regional party leaders and regional party members in addition to the national membership and leadership.
Party leaders
Parties are typically led by a party leader
In a governmental system, a party leader acts as the official representative of their political party, either to a legislature or to the electorate. Depending on the country, the individual colloquially referred to as the "leader" of a political ...
, who serves as the main representative of the party and often has primary responsibility for overseeing the party's policies and strategies. The leader of the party that controls the government usually becomes the head of government
The head of government is the highest or the second-highest official in the executive branch of a sovereign state, a federated state, or a self-governing colony, autonomous region, or other government who often presides over a cabinet, ...
, such as the president or prime minister
A prime minister, premier or chief of cabinet is the head of the cabinet and the leader of the ministers in the executive branch of government, often in a parliamentary or semi-presidential system. Under those systems, a prime minister is ...
, and the leaders of other parties explicitly compete to become the head of government. In both presidential democracies and parliamentary democracies, the members of a party frequently have substantial input into the selection of party leaders, for example by voting on party leadership at a party conference
The terms party conference ( UK English), political convention ( US and Canadian English), and party congress usually refer to a general meeting of a political party. The conference is attended by certain delegates who represent the party mem ...
. Because the leader of a major party is a powerful and visible person, many party leaders are well-known career politicians. Party leaders can be sufficiently prominent that they affect voters' perceptions of the entire party, and some voters decide how to vote in elections partly based on how much they like the leaders of the different parties.
The number of people involved in choosing party leaders varies widely across parties and across countries. On one extreme, party leaders might be selected from the entire electorate; on the opposite extreme, they might be selected by just one individual. Selection by a smaller group can be a feature of party leadership transitions in more autocratic countries, where the existence of political parties may be severely constrained to only one legal political party, or only one competitive party. Some of these parties, like the Chinese Communist Party
The Chinese Communist Party (CCP), officially the Communist Party of China (CPC), is the founding and sole ruling party of the People's Republic of China (PRC). Under the leadership of Mao Zedong, the CCP emerged victorious in the Chinese Ci ...
, have rigid methods for selecting the next party leader, which involves selection by other party members. A small number of single-party states have hereditary succession, where party leadership is inherited by the child of an outgoing party leader. Autocratic parties use more restrictive selection methods to avoid having major shifts in the regime as a result of successions.
Party executives
In both democratic and non-democratic countries, the party leader is often the foremost member of a larger party leadership. A party executive will commonly include administrative positions, like a party secretary and a