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metaphilosophy Metaphilosophy, sometimes called the philosophy of philosophy, is "the investigation of the nature of philosophy". Its subject matter includes the aims of philosophy, the boundaries of philosophy, and its methods. Thus, while philosophy character ...
and
ethics Ethics or moral philosophy is a branch of philosophy that "involves systematizing, defending, and recommending concepts of right and wrong behavior".''Internet Encyclopedia of Philosophy'' The field of ethics, along with aesthetics, concer ...
, meta-ethics is the study of the nature, scope, and meaning of moral judgment. It is one of the three branches of ethics generally studied by philosophers, the others being normative ethics (questions of how one ought to be and act) and
applied ethics Applied ethics refers to the practical aspect of moral considerations. It is ethics with respect to real-world actions and their moral considerations in the areas of private and public life, the professions, health, technology, law, and leadersh ...
(practical questions of right behavior in given, usually contentious, situations). While normative ethics addresses such questions as "What should I do?", evaluating specific practices and principles of action, meta-ethics addresses questions such as "What ''is''
good In most contexts, the concept of good denotes the conduct that should be preferred when posed with a choice between possible actions. Good is generally considered to be the opposite of evil and is of interest in the study of ethics, morality, ph ...
ness?" and "How can we tell what is good from what is bad?", seeking to understand the assumptions underlying normative theories. Another distinction often made is that normative ethics involves first-order or substantive questions; meta-ethics involves second-order or formal questions. Some theorists argue that a
metaphysical Metaphysics is the branch of philosophy that studies the fundamental nature of reality, the first principles of being, identity and change, space and time, causality, necessity, and possibility. It includes questions about the nature of conscio ...
account of
morality Morality () is the differentiation of intentions, decisions and actions between those that are distinguished as proper (right) and those that are improper (wrong). Morality can be a body of standards or principles derived from a code of co ...
is necessary for the proper evaluation of actual moral theories and for making practical moral decisions; others reason from opposite premises and suggest that studying moral judgments about proper actions can guide us to a true account of the nature of morality.


Meta-ethical questions

According to Richard Garner and Bernard Rosen, there are three kinds of meta-ethical problems, or three general questions: #What is the meaning of moral terms or judgments ? (moral
semantics Semantics (from grc, σημαντικός ''sēmantikós'', "significant") is the study of reference, meaning, or truth. The term can be used to refer to subfields of several distinct disciplines, including philosophy, linguistics and comp ...
) #*Asks about the meanings of such words as 'good', 'bad', 'right' and 'wrong' (see
value theory In ethics and the social sciences, value theory involves various approaches that examine how, why, and to what degree humans value things and whether the object or subject of valuing is a person, idea, object, or anything else. Within philosophy ...
) #What is the nature of moral judgments ? (moral
ontology In metaphysics, ontology is the philosophical study of being, as well as related concepts such as existence, becoming, and reality. Ontology addresses questions like how entities are grouped into categories and which of these entities exi ...
) #*Asks questions of whether moral judgments are absolute or relative, of one kind or many kinds, etc. #How may moral judgments be supported or defended ? (moral
epistemology Epistemology (; ), or the theory of knowledge, is the branch of philosophy concerned with knowledge. Epistemology is considered a major subfield of philosophy, along with other major subfields such as ethics, logic, and metaphysics. Epis ...
) #*Asks such questions as how we can know if something is right or wrong, if at all. Garner and Rosen say that answers to the three basic questions "are not unrelated, and sometimes an answer to one will strongly suggest, or perhaps even entail, an answer to another." A meta-ethical theory, unlike a normative ethical theory, does not attempt to evaluate specific choices as being better, worse, good, bad, or evil; although it may have profound implications as to the validity and meaning of normative ethical claims. An answer to any of the three example questions above would not itself be a normative ethical statement.


Moral semantics

Moral semantics attempts to answer the question, "What is the meaning of moral terms or judgments?" Answers may have implications for answers to the other two questions as well.


Cognitivist theories

'' Cognitivist'' theories hold that evaluative moral sentences express
proposition In logic and linguistics, a proposition is the meaning of a declarative sentence. In philosophy, " meaning" is understood to be a non-linguistic entity which is shared by all sentences with the same meaning. Equivalently, a proposition is the no ...
s (i.e., they are 'truth-apt' or ' truth bearers', capable of being true or false), as opposed to
non-cognitivism Non-cognitivism is the meta-ethical view that ethical sentences do not express propositions (i.e., statements) and thus cannot be true or false (they are not truth-apt). A noncognitivist denies the cognitivist claim that "moral judgments are ...
. Most forms of cognitivism hold that some such propositions are true (including moral realism and ethical subjectivism), as opposed to
error theory Moral nihilism (also known as ethical nihilism) is the meta-ethical view that nothing is morally right or wrong. Moral nihilism is distinct from moral relativism, which allows for actions to be wrong relative to a particular culture or indivi ...
, which asserts that all are erroneous.


Moral realism

Moral realism (in the ''robust'' sense;
cf. The abbreviation ''cf.'' (short for the la, confer/conferatur, both meaning "compare") is used in writing to refer the reader to other material to make a comparison with the topic being discussed. Style guides recommend that ''cf.'' be used onl ...
moral universalism for the minimalist sense) holds that such propositions are about ''robust'' or mind-independent facts, that is, not facts about any person or group's subjective opinion, but about objective features of the world. Meta-ethical theories are commonly categorized as either a form of realism or as one of three forms of "
anti-realism In analytic philosophy, anti-realism is a position which encompasses many varieties such as metaphysical, mathematical, semantic, scientific, moral and epistemic. The term was first articulated by British philosopher Michael Dummett in an argument ...
" regarding moral facts:
ethical subjectivism Ethical subjectivism or moral non-objectivism is the meta-ethical view which claims that: #Ethical sentences express propositions. #Some such propositions are true. #The truth or falsity of such propositions is ineliminably dependent on the (actu ...
,
error theory Moral nihilism (also known as ethical nihilism) is the meta-ethical view that nothing is morally right or wrong. Moral nihilism is distinct from moral relativism, which allows for actions to be wrong relative to a particular culture or indivi ...
, or
non-cognitivism Non-cognitivism is the meta-ethical view that ethical sentences do not express propositions (i.e., statements) and thus cannot be true or false (they are not truth-apt). A noncognitivist denies the cognitivist claim that "moral judgments are ...
. Realism comes in two main varieties: # ''
Ethical naturalism Ethical naturalism (also called moral naturalism or naturalistic cognitivistic definism) is the meta-ethical view which claims that: # Ethical sentences express propositions. # Some such propositions are true. # Those propositions are made true ...
'' holds that there are objective moral properties and that these properties are reducible or stand in some metaphysical relation (such as
supervenience In philosophy, supervenience refers to a relation between sets of properties or sets of facts. X is said to supervene on Y if and only if some difference in Y is necessary for any difference in X to be possible. Some examples include: * Whether t ...
) to entirely non-ethical properties. Most ethical naturalists hold that we have empirical knowledge of moral truths. Ethical naturalism was implicitly assumed by many modern ethical theorists, particularly
utilitarians In ethical philosophy, utilitarianism is a family of normative ethical theories that prescribe actions that maximize happiness and well-being for all affected individuals. Although different varieties of utilitarianism admit different charact ...
. # ''
Ethical non-naturalism Ethical non-naturalism (or moral non-naturalism) is the meta-ethical view which claims that: # Ethical sentences express propositions. # Some such propositions are true. # Those propositions are made true by objective features of the world, inde ...
'', as put forward by
G. E. Moore George Edward Moore (4 November 1873 – 24 October 1958) was an English philosopher, who with Bertrand Russell, Ludwig Wittgenstein and earlier Gottlob Frege was among the founders of analytic philosophy. He and Russell led the turn from ideal ...
, holds that there are objective and ''irreducible'' moral properties (such as the property of 'goodness'), and that we sometimes have intuitive or otherwise ''
a priori ("from the earlier") and ("from the later") are Latin phrases used in philosophy to distinguish types of knowledge, justification, or argument by their reliance on empirical evidence or experience. knowledge is independent from current ...
'' awareness of moral properties or of moral truths. Moore's
open question argument The open-question argument is a philosophical argument put forward by British philosopher G. E. Moore i§13of ''Principia Ethica'' (1903), to refute the equating of the property of goodness with some non-moral property, X, whether natural (e.g. ple ...
against what he considered the
naturalistic fallacy In philosophical ethics, the naturalistic fallacy is the claim that any reductive explanation of good, in terms of natural properties such as ''pleasant'' or ''desirable'', is false. The term was introduced by British philosopher G. E. Moore in ...
was largely responsible for the birth of meta-ethical research in contemporary analytic philosophy.


Ethical subjectivism

Ethical subjectivism Ethical subjectivism or moral non-objectivism is the meta-ethical view which claims that: #Ethical sentences express propositions. #Some such propositions are true. #The truth or falsity of such propositions is ineliminably dependent on the (actu ...
is one form of moral anti-realism. It holds that moral statements are made true or false by the attitudes and/or conventions of people, either those of each society, those of each individual, or those of some particular individual. Most forms of ethical subjectivism are
relativist Relativism is a family of philosophical views which deny claims to objectivity within a particular domain and assert that valuations in that domain are relative to the perspective of an observer or the context in which they are assessed. Ther ...
, but there are notable forms that are universalist: *
Ideal observer theory Ideal observer theory is the meta-ethical view which claims that ethical sentences express truth-apt propositions about the attitudes of a hypothetical ''ideal observer''. In other words, ideal observer theory states that ethical judgments should b ...
holds that what is right is determined by the attitudes that a hypothetical ''ideal observer'' would have. An ideal observer is usually characterized as a being who is perfectly rational, imaginative, and informed, among other things. Though a subjectivist theory due to its reference to a particular (albeit hypothetical) subject, Ideal Observer Theory still purports to provide
universal Universal is the adjective for universe. Universal may also refer to: Companies * NBCUniversal, a media and entertainment company ** Universal Animation Studios, an American Animation studio, and a subsidiary of NBCUniversal ** Universal TV, a ...
answers to moral questions. *
Divine command theory Divine command theory (also known as theological voluntarism) is a meta-ethical theory which proposes that an action's status as morally good is equivalent to whether it is commanded by God. The theory asserts that what is moral is determined ...
holds that for a thing to be right is for a unique being, God, to approve of it, and that what is right for non-God beings is obedience to the divine will. This view was criticized by Plato in the ''
Euthyphro ''Euthyphro'' (; grc, Εὐθύφρων, translit=Euthyphrōn; c. 399–395 BC), by Plato, is a Socratic dialogue whose events occur in the weeks before the trial of Socrates (399 BC), between Socrates and Euthyphro. The dialogue covers sub ...
'' (see the
Euthyphro problem The Euthyphro dilemma is found in Plato's dialogue ''Euthyphro'', in which Socrates asks Euthyphro, "Is the pious ( τὸ ὅσιον) loved by the gods because it is pious, or is it pious because it is loved by the gods?" ( 10a) Although it ...
) but retains some modern defenders ( Robert Adams, Philip Quinn, and others). Like ideal observer theory, divine command theory purports to be universalist despite its subjectivism.


Error theory

Error theory Moral nihilism (also known as ethical nihilism) is the meta-ethical view that nothing is morally right or wrong. Moral nihilism is distinct from moral relativism, which allows for actions to be wrong relative to a particular culture or indivi ...
, another form of moral anti-realism, holds that although ethical claims do express propositions, all such propositions are false. Thus, both the statement "Murder is morally wrong" and the statement "Murder is morally permissible" are false, according to error theory. J. L. Mackie is probably the best-known proponent of this view. Since error theory denies that there are moral truths, error theory entails moral nihilism and, thus, moral skepticism; however, neither moral nihilism nor moral skepticism conversely entail error theory.


Non-cognitivist theories

Non-cognitivist theories hold that ethical sentences are neither true nor false because they do not express genuine
proposition In logic and linguistics, a proposition is the meaning of a declarative sentence. In philosophy, " meaning" is understood to be a non-linguistic entity which is shared by all sentences with the same meaning. Equivalently, a proposition is the no ...
s. Non-cognitivism is another form of moral anti-realism. Most forms of non-cognitivism are also forms of
expressivism In meta-ethics, expressivism is a theory about the meaning of moral language. According to expressivism, sentences that employ moral terms – for example, "It is wrong to torture an innocent human being" – are not descriptive or fact-stating; ...
, however some such as Mark Timmons and Terrence Horgan distinguish the two and allow the possibility of cognitivist forms of expressivism. Non-cognitivism includes: *
Emotivism Emotivism is a meta-ethical view that claims that ethical sentences do not express propositions but emotional attitudes. Hence, it is colloquially known as the hurrah/boo theory. Influenced by the growth of analytic philosophy and logical positi ...
, defended by A. J. Ayer and Charles Stevenson, holds that ethical sentences serve merely to express emotions. Ayer argues that ethical sentences are expressions of approval or disapproval, not assertions. So "Killing is wrong" means something like "Boo on killing!". *
Quasi-realism Quasi-realism is the meta-ethical view which claims that: # Ethical sentences do not express propositions. # Instead, ethical sentences project emotional attitudes as though they were real properties. This makes quasi-realism a form of non-cogn ...
, defended by
Simon Blackburn Simon Blackburn (born 12 July 1944) is an English academic philosopher known for his work in metaethics, where he defends quasi-realism, and in the philosophy of language; more recently, he has gained a large general audience from his effort ...
, holds that ethical statements behave linguistically like factual claims and can be appropriately called "true" or "false", even though there are no ethical facts for them to correspond to. Projectivism and
moral fictionalism Fictionalism is the view in philosophy according to which statements that appear to be descriptions of the world should not be construed as such, but should instead be understood as cases of "make believe", of pretending to treat something as lite ...
are related theories. *
Universal prescriptivism Universal prescriptivism (often simply called prescriptivism) is the meta-ethical view that claims that, rather than expressing propositions, ethical sentences function similarly to imperatives which are universalizable—whoever makes a mo ...
, defended by R. M. Hare, holds that moral statements function like universalized imperative sentences. So "Killing is wrong" means something like "Don't kill!" Hare's version of prescriptivism requires that moral prescriptions be universalizable, and hence actually have objective values, in spite of failing to be
indicative A realis mood ( abbreviated ) is a grammatical mood which is used principally to indicate that something is a statement of fact; in other words, to express what the speaker considers to be a known state of affairs, as in declarative sentences. Mos ...
statements with
truth-value In logic and mathematics, a truth value, sometimes called a logical value, is a value indicating the relation of a proposition to truth, which in classical logic has only two possible values (''true'' or '' false''). Computing In some progra ...
s per se.


Centralism and non-centralism

Yet another way of categorizing meta-ethical theories is to distinguish between centralist and non-centralist moral theories. The debate between centralism and non-centralism revolves around the relationship between the so-called "thin" and "thick" concepts of morality: thin moral concepts are those such as good, bad, right, and wrong; thick moral concepts are those such as courageous, inequitable, just, or dishonest. While both sides agree that the thin concepts are more general and the thick more specific, centralists hold that the thin concepts are antecedent to the thick ones and that the latter are therefore dependent on the former. That is, centralists argue that one must understand words like "right" and "ought" before understanding words like "just" and "unkind." Non-centralism rejects this view, holding that thin and thick concepts are on par with one another and even that the thick concepts are a sufficient starting point for understanding the thin ones. Non-centralism has been of particular importance to ethical naturalists in the late 20th and early 21st centuries as part of their argument that normativity is a non-excisable aspect of language and that there is no way of analyzing thick moral concepts into a purely descriptive element attached to a thin moral evaluation, thus undermining any fundamental division between facts and norms.
Allan Gibbard Allan may refer to: People * Allan (name), a given name and surname, including list of people and characters with this name * Allan (footballer, born 1984) (Allan Barreto da Silva), Brazilian football striker * Allan (footballer, born 1989) (Al ...
, R. M. Hare, and
Simon Blackburn Simon Blackburn (born 12 July 1944) is an English academic philosopher known for his work in metaethics, where he defends quasi-realism, and in the philosophy of language; more recently, he has gained a large general audience from his effort ...
have argued in favor of the fact/norm distinction, meanwhile, with Gibbard going so far as to argue that, even if conventional English has only mixed normative terms (that is, terms that are neither purely descriptive nor purely normative), we could develop a nominally English metalanguage that still allowed us to maintain the division between factual descriptions and normative evaluations.


Moral ontology

Moral ontology attempts to answer the question, "What is the nature of moral judgments?" Amongst those who believe there to be some standard(s) of morality (as opposed to moral nihilists), there are two divisions: #
universalists Universalism is the philosophical and theological concept that some ideas have universal application or applicability. A belief in one fundamental truth is another important tenet in universalism. The living truth is seen as more far-reaching th ...
, who hold that the same moral facts or principles apply to everyone everywhere; and # relativists, who hold that different moral facts or principles apply to different people or societies.


Moral universalism

Moral universalism (or universal morality) is the meta-ethical position that some system of ethics, or a universal ethic, applies universally, that is to all intelligent beings regardless of
culture Culture () is an umbrella term which encompasses the social behavior, institutions, and norms found in human societies, as well as the knowledge, beliefs, arts, laws, customs, capabilities, and habits of the individuals in these groups ...
,
race Race, RACE or "The Race" may refer to: * Race (biology), an informal taxonomic classification within a species, generally within a sub-species * Race (human categorization), classification of humans into groups based on physical traits, and/or s ...
,
sex Sex is the trait that determines whether a sexually reproducing animal or plant produces male or female gametes. Male plants and animals produce smaller mobile gametes (spermatozoa, sperm, pollen), while females produce larger ones ( ova, of ...
,
religion Religion is usually defined as a social- cultural system of designated behaviors and practices, morals, beliefs, worldviews, texts, sanctified places, prophecies, ethics, or organizations, that generally relates humanity to supernatural, ...
,
nationality Nationality is a legal identification of a person in international law, establishing the person as a subject, a ''national'', of a sovereign state. It affords the state jurisdiction over the person and affords the person the protection of the ...
, sexuality, or other distinguishing feature. The source or justification of this system may be thought to be, for instance,
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 ...
, shared vulnerability to suffering, the demands of universal
reason Reason is the capacity of consciously applying logic by drawing conclusions from new or existing information, with the aim of seeking the truth. It is closely associated with such characteristically human activities as philosophy, science, ...
, what is common among existing moral codes, or the common mandates of
religion Religion is usually defined as a social- cultural system of designated behaviors and practices, morals, beliefs, worldviews, texts, sanctified places, prophecies, ethics, or organizations, that generally relates humanity to supernatural, ...
(although it can be argued that the latter is not in fact moral universalism because it may distinguish between Gods and mortals). Moral universalism is the opposing position to various forms of moral relativism. Universalist theories are generally forms of moral realism, though exceptions exists, such as the subjectivist ideal observer and
divine command Divine command theory (also known as theological voluntarism) is a meta-ethical theory which proposes that an action's status as morally good is equivalent to whether it is commanded by God. The theory asserts that what is moral is determined ...
theories, and the non-cognitivist
universal prescriptivism Universal prescriptivism (often simply called prescriptivism) is the meta-ethical view that claims that, rather than expressing propositions, ethical sentences function similarly to imperatives which are universalizable—whoever makes a mo ...
of R. M. Hare. Forms of moral universalism include: * Value monism is the common form of universalism, which holds that all goods are commensurable on a single value scale. *
Value pluralism In ethics, value pluralism (also known as ethical pluralism or moral pluralism) is the idea that there are several values which may be equally correct and fundamental, and yet in conflict with each other. In addition, value-pluralism postulates th ...
contends that there are two or more genuine scales of value, knowable as such, yet incommensurable, so that any prioritization of these values is either non-cognitive or subjective. A value pluralist might, for example, contend that both a life as a nun and a life as a mother realize genuine values (in a universalist sense), yet they are incompatible (nuns may not have children), and there is no purely rational way to measure which is preferable. A notable proponent of this view is Isaiah Berlin.


Moral relativism

Moral relativism maintains that all moral judgments have their origins either in societal or in individual standards, and that no single standard exists by which one can objectively assess the truth of a moral proposition. Meta-ethical relativists, in general, believe that the descriptive properties of terms such as "good", "bad", "right", and "wrong" do not stand subject to
universal Universal is the adjective for universe. Universal may also refer to: Companies * NBCUniversal, a media and entertainment company ** Universal Animation Studios, an American Animation studio, and a subsidiary of NBCUniversal ** Universal TV, a ...
truth Truth is the property of being in accord with fact or reality.Merriam-Webster's Online Dictionarytruth 2005 In everyday language, truth is typically ascribed to things that aim to represent reality or otherwise correspond to it, such as belie ...
conditions, but only to societal convention and personal preference. Given the same set of verifiable facts, some societies or individuals will have a fundamental disagreement about what one ''ought'' to do based on societal or individual norms, and one cannot adjudicate these using some independent standard of evaluation. The latter standard will always be societal or personal and not universal, unlike, for example, the scientific standards for assessing
temperature Temperature is a physical quantity that expresses quantitatively the perceptions of hotness and coldness. Temperature is measurement, measured with a thermometer. Thermometers are calibrated in various Conversion of units of temperature, temp ...
or for determining mathematical truths.


Moral nihilism

Moral nihilism, also known as ethical nihilism, is the meta-ethical view that nothing has intrinsic moral value. For example, a moral nihilist would say that killing someone, for whatever reason, is intrinsically neither morally right nor morally wrong. Moral nihilism must be distinguished from moral relativism, which does allow for moral statements to be intrinsically true or false in a non-universal sense, but does not assign any static truth-values to moral statements. Insofar as only true statements can be known, moral nihilists are moral skeptics. Most forms of moral nihilism are non-cognitivist and vice versa, though there are notable exceptions such as
universal prescriptivism Universal prescriptivism (often simply called prescriptivism) is the meta-ethical view that claims that, rather than expressing propositions, ethical sentences function similarly to imperatives which are universalizable—whoever makes a mo ...
(which is semantically non-cognitive but substantially universal).


Moral epistemology

Moral epistemology is the study of moral knowledge. It attempts to answer such questions as, "How may moral judgments be supported or defended?" and "Is moral knowledge possible?" If one presupposes a cognitivist interpretation of moral sentences, morality is justified by the moralist's knowledge of moral facts, and the theories to justify moral judgements are epistemological theories. Most moral epistemologies posit that moral knowledge is somehow possible (including empiricism and moral rationalism), as opposed to moral skepticism. Amongst them, there are those who hold that moral knowledge is gained inferentially on the basis of some sort of non-moral epistemic process, as opposed to
ethical intuitionism Ethical intuitionism (also called moral intuitionism) is a view or family of views in moral epistemology (and, on some definitions, metaphysics). It is foundationalism applied to moral knowledge, the thesis that some moral truths can be known no ...
.


Moral knowledge gained by inference


Empiricism

Empiricism is the doctrine that knowledge is gained primarily through observation and experience. Meta-ethical theories that imply an empirical epistemology include: *
ethical naturalism Ethical naturalism (also called moral naturalism or naturalistic cognitivistic definism) is the meta-ethical view which claims that: # Ethical sentences express propositions. # Some such propositions are true. # Those propositions are made true ...
, which holds moral facts to be reducible to non-moral facts and thus knowable in the same ways; and * most common forms of
ethical subjectivism Ethical subjectivism or moral non-objectivism is the meta-ethical view which claims that: #Ethical sentences express propositions. #Some such propositions are true. #The truth or falsity of such propositions is ineliminably dependent on the (actu ...
, which hold that moral facts reduce to facts about individual opinions or cultural conventions and thus are knowable by observation of those conventions. There are exceptions within subjectivism however, such as
ideal observer theory Ideal observer theory is the meta-ethical view which claims that ethical sentences express truth-apt propositions about the attitudes of a hypothetical ''ideal observer''. In other words, ideal observer theory states that ethical judgments should b ...
, which implies that moral facts may be known through a rational process, and individualist ethical subjectivism, which holds that moral facts are merely personal opinions and so may be known only through introspection. Empirical arguments for ethics run into the '' is-ought'' problem, which asserts that the way the world ''is'' cannot alone instruct people how they ''ought'' to act.


Moral rationalism

Moral rationalism Moral rationalism, also called ethical rationalism, is a view in meta-ethics (specifically the epistemology of ethics) according to which moral principles are knowable '' a priori'', by reason alone. Some prominent figures in the history of phil ...
, also called ethical rationalism, is the view according to which moral truths (or at least general moral principles) are knowable ''
a priori ("from the earlier") and ("from the later") are Latin phrases used in philosophy to distinguish types of knowledge, justification, or argument by their reliance on empirical evidence or experience. knowledge is independent from current ...
'', by reason alone. Some prominent figures in the history of philosophy who have defended moral rationalism are
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 institution ...
and
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 ...
. Perhaps the most prominent figures in the history of philosophy who have rejected moral rationalism are
David Hume David Hume (; born David Home; 7 May 1711 NS (26 April 1711 OS) – 25 August 1776) Cranston, Maurice, and Thomas Edmund Jessop. 2020 999br>David Hume" ''Encyclopædia Britannica''. Retrieved 18 May 2020. was a Scottish Enlightenment phil ...
and
Friedrich Nietzsche Friedrich Wilhelm Nietzsche (; or ; 15 October 1844 – 25 August 1900) was a German philosopher, prose poet, cultural critic, philologist, and composer whose work has exerted a profound influence on contemporary philosophy. He began his ...
. Recent philosophers who defended moral rationalism include R. M. Hare, Christine Korsgaard,
Alan Gewirth Alan Gewirth (November 28, 1912 – May 9, 2004) was an American philosopher, a professor of philosophy at the University of Chicago, and author of '' Reason and Morality'' (1978), ''Human Rights: Essays on Justification and Applications'' (19 ...
, and Michael Smith. A moral rationalist may adhere to any number of different semantic theories as well; moral realism is compatible with rationalism, and the subjectivist
ideal observer theory Ideal observer theory is the meta-ethical view which claims that ethical sentences express truth-apt propositions about the attitudes of a hypothetical ''ideal observer''. In other words, ideal observer theory states that ethical judgments should b ...
and non-cognitivist
universal prescriptivism Universal prescriptivism (often simply called prescriptivism) is the meta-ethical view that claims that, rather than expressing propositions, ethical sentences function similarly to imperatives which are universalizable—whoever makes a mo ...
both entail it.


Ethical intuitionism

Ethical intuitionism Ethical intuitionism (also called moral intuitionism) is a view or family of views in moral epistemology (and, on some definitions, metaphysics). It is foundationalism applied to moral knowledge, the thesis that some moral truths can be known no ...
is the view according to which some moral truths can be known ''without'' inference. That is, the view is at its core a foundationalism about moral beliefs. Such an epistemological view implies that there are moral beliefs with propositional contents; so it implies cognitivism. Ethical intuitionism commonly suggests moral realism, the view that there are
objective Objective may refer to: * Objective (optics), an element in a camera or microscope * ''The Objective'', a 2008 science fiction horror film * Objective pronoun, a personal pronoun that is used as a grammatical object * Objective Productions, a Brit ...
facts of morality and, to be more specific,
ethical non-naturalism Ethical non-naturalism (or moral non-naturalism) is the meta-ethical view which claims that: # Ethical sentences express propositions. # Some such propositions are true. # Those propositions are made true by objective features of the world, inde ...
, the view that these evaluative facts cannot be reduced to natural fact. However, neither moral realism nor ethical non-naturalism are essential to the view; most ethical intuitionists simply happen to hold those views as well. Ethical intuitionism comes in both a "rationalist" variety, and a more "empiricist" variety known as
moral sense theory Moral sense theory (also known as moral sentimentalism) is a theory in moral epistemology and meta-ethics concerning the discovery of moral truths. Moral sense theory typically holds that distinctions between morality and immorality are discovered ...
.


Moral skepticism

Moral skepticism is the class of meta-ethical theories all members of which entail that no one has any moral knowledge. Many moral skeptics also make the stronger, modal, claim that moral knowledge is impossible. Forms of moral skepticism include, but are not limited to,
error theory Moral nihilism (also known as ethical nihilism) is the meta-ethical view that nothing is morally right or wrong. Moral nihilism is distinct from moral relativism, which allows for actions to be wrong relative to a particular culture or indivi ...
and most but not all forms of
non-cognitivism Non-cognitivism is the meta-ethical view that ethical sentences do not express propositions (i.e., statements) and thus cannot be true or false (they are not truth-apt). A noncognitivist denies the cognitivist claim that "moral judgments are ...
.


See also

* Anthropic principle * Axiology *
Deontic logic Deontic logic is the field of philosophical logic that is concerned with obligation, permission, and related concepts. Alternatively, a deontic logic is a formal system that attempts to capture the essential logical features of these concepts. It ...
*
Ethical subjectivism Ethical subjectivism or moral non-objectivism is the meta-ethical view which claims that: #Ethical sentences express propositions. #Some such propositions are true. #The truth or falsity of such propositions is ineliminably dependent on the (actu ...
*
Fact–value distinction The fact–value distinction is a fundamental epistemological distinction described between: #'Statements of fact' ( 'positive' or 'descriptive statements'), based upon reason and physical observation, and which are examined via the empirical m ...
* Is–ought problem * Meta-rights * Moral realism * Normative ethics * ''
Principia Ethica ''Principia Ethica'' is a 1903 book by the British philosopher G. E. Moore, in which the author insists on the indefinability of "good" and provides an exposition of the naturalistic fallacy. ''Principia Ethica'' was influential, and Moore's ...
'' *
The Right and the Good ''The Right and the Good'' is a 1930 book by the Scottish philosopher David Ross. In it, Ross develops a deontological pluralism based on prima facie duties. Ross defends a realist position about morality and an intuitionist position about mor ...


References


External links

*
Metaethics
– entry in the '' Internet Encyclopedia of Philosophy''
''The Language of Morals''
(1952) by R. M. Hare
''Groundwork of the Metaphysics of Morals''
by Immanuel Kant

on meta-ethics, especially intuitionism

by J. J. Mittler {{DEFAULTSORT:Meta-Ethics Ethics Metaphilosophy