Compatibilism is the belief that
free will
Free will is the capacity of agents to choose between different possible courses of action unimpeded.
Free will is closely linked to the concepts of moral responsibility, praise, culpability, sin, and other judgements which apply only to a ...
and
determinism
Determinism is a philosophical view, where all events are determined completely by previously existing causes. Deterministic theories throughout the history of philosophy have developed from diverse and sometimes overlapping motives and consi ...
are mutually compatible and that it is possible to believe in both without being logically inconsistent.
Compatibilists believe that freedom can be present or absent in situations for reasons that have nothing to do with
metaphysics
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 ...
.
They say that causal determinism does not exclude the truth of possible future outcomes.
Similarly,
political liberty is a non-metaphysical concept. Statements of political liberty, such as the
United States Bill of Rights
The United States Bill of Rights comprises the first ten amendments to the United States Constitution. Proposed following the often bitter 1787–88 debate over the ratification of the Constitution and written to address the objections ra ...
, assume moral liberty: the
ability
Abilities are powers an agent has to perform various actions. They include common abilities, like walking, and rare abilities, like performing a double backflip. Abilities are intelligent powers: they are guided by the person's intention and exe ...
to choose to do otherwise than what one does.
History
Compatibilism was mentioned and championed by the ancient
Stoics
Stoicism is a school of Hellenistic philosophy founded by Zeno of Citium in Athens in the early 3rd century BCE. It is a philosophy of personal virtue ethics informed by its system of logic and its views on the natural world, asserting th ...
and some medieval
scholastics
Scholasticism was a medieval school of philosophy that employed a critical organic method of philosophical analysis predicated upon the Aristotelian 10 Categories. Christian scholasticism emerged within the monastic schools that translat ...
. More specifically, scholastics like
Thomas Aquinas
Thomas Aquinas, OP (; it, Tommaso d'Aquino, lit=Thomas of Aquino; 1225 – 7 March 1274) was an Italian Dominican friar and priest who was an influential philosopher, theologian and jurist in the tradition of scholasticism; he is known wi ...
and later
Thomists (such as
Domingo Báñez) are often interpreted as holding that human action can be free, even though an agent in some strong sense could not do otherwise than what they did. Whereas Aquinas is often interpreted to maintain rational compatibilism (i.e., an action can be determined by rational cognition and yet free), later Thomists, such as Báñez, develop a sophisticated theory of theological determinism, according to which actions of free agents, despite being free, are, on a higher level, determined by infallible divine decrees manifested in the form of "
physical premotion" (), a deterministic intervention of God into the will of a free agent required to reduce the will from potency to act. A strong incompatibilist view of freedom was, on the other hand, developed in the
Franciscan
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, abbreviation = OFM
, predecessor =
, ...
tradition, especially by
Duns Scotus
John Duns Scotus ( – 8 November 1308), commonly called Duns Scotus ( ; ; "Duns the Scot"), was a Scottish Catholic priest and Franciscan friar, university professor, philosopher, and theologian. He is one of the four most important ...
, and later upheld and further developed by
Jesuits
The Society of Jesus ( la, Societas Iesu; abbreviation: SJ), also known as the Jesuits (; la, Iesuitæ), is a religious order (Catholic), religious order of clerics regular of pontifical right for men in the Catholic Church headquartered in Rom ...
, especially
Luis de Molina
Luis de Molina (29 September 1535 – 12 October 1600) was a Spanish Jesuit priest and scholastic, a staunch defender of free will in the controversy over human liberty and God's grace. His theology is known as Molinism.
Life
From 1551 ...
and
Francisco Suárez
Francisco Suárez, (5 January 1548 – 25 September 1617) was a Spanish Jesuit priest, philosopher and theologian, one of the leading figures of the School of Salamanca movement, and generally regarded among the greatest scholastics after Thoma ...
. In the early modern era, compatibilism was maintained by
Enlightenment philosophers (such as
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
Thomas Hobbes
Thomas Hobbes ( ; 5/15 April 1588 – 4/14 December 1679) was an English philosopher, considered to be one of the founders of modern political philosophy. Hobbes is best known for his 1651 book '' Leviathan'', in which he expounds an influ ...
).
During the 20th century, compatibilists presented novel arguments that differed from the classical arguments of Hume, Hobbes, and
John Stuart Mill. Importantly,
Harry Frankfurt popularized what are now known as
Frankfurt counterexamples Frankfurt cases (also known as Frankfurt counterexamples or Frankfurt-style cases) were presented by philosopher Harry Frankfurt in 1969 as counterexamples to the principle of alternate possibilities (PAP), which holds that an agent is morally resp ...
to argue against
incompatibilism, and developed a positive account of compatibilist free will based on
higher-order volition Higher-order volitions (or higher-order desire), as opposed to action-determining volitions, are volitions about volitions. Higher-order volitions are potentially more often guided by long-term beliefs and reasoning.
A first-order volition is a ...
s. Other "new compatibilists" include Gary Watson,
Susan R. Wolf
Susan Rose Wolf (born 1952) is an American moral philosopher and philosopher of action who is currently the Edna J. Koury Professor of Philosophy at the University of North Carolina at Chapel Hill. She taught previously at Johns Hopkins Univer ...
,
P. F. Strawson, and
R. Jay Wallace. Contemporary compatibilists range from the philosopher and cognitive scientist
Daniel Dennett
Daniel Clement Dennett III (born March 28, 1942) is an American philosopher, writer, and cognitive scientist whose research centers on the philosophy of mind, philosophy of science, and philosophy of biology, particularly as those fields rel ...
, particularly in his works ''
Elbow Room'' (1984) and ''
Freedom Evolves
''Freedom Evolves'' is a 2003 popular science and philosophy book by Daniel C. Dennett. Dennett describes the book as an installment of a lifelong philosophical project, earlier parts of which were ''The Intentional Stance'', '' Consciousness Exp ...
'' (2003), to the existentialist philosopher
Frithjof Bergmann.
Perhaps the most renowned contemporary defender of compatibilism is
John Martin Fischer
John Martin Fischer (born December 26, 1952) is an American philosopher. He is Distinguished Professor of Philosophy at the University of California, Riverside and a leading contributor to the philosophy of free will and moral responsibility.
E ...
.
A 2020 survey found that 59% of philosophers accept compatibilism.
Defining free will

''Compatibilists'' often define an instance of "free will" as one in which the agent had the freedom to act according to their own ''
motivation
Motivation is the reason for which humans and other animals initiate, continue, or terminate a behavior at a given time. Motivational states are commonly understood as forces acting within the agent that create a disposition to engage in goal-dire ...
''. That is, the agent was not coerced or restrained.
Arthur Schopenhauer
Arthur Schopenhauer ( , ; 22 February 1788 – 21 September 1860) was a German philosopher. He is best known for his 1818 work '' The World as Will and Representation'' (expanded in 1844), which characterizes the phenomenal world as the pr ...
famously said: "Man can do what he wills but he cannot will what he wills." In other words, although an agent may often be free to act according to a ''motive'', the nature of that motive is determined. This definition of free will does not rely on the truth or falsity of
causal determinism
Determinism is a philosophical view, where all events are determined completely by previously existing causes. Deterministic theories throughout the history of philosophy have developed from diverse and sometimes overlapping motives and consi ...
.
This view also makes ''free will'' close to ''
autonomy'', the ability to live according to one's own rules, as opposed to being submitted to external domination.
Alternatives as imaginary

Some compatibilists hold both causal determinism (all effects have causes) and
logical determinism (the future is already determined) to be true. Thus statements about the future (e.g., "it will rain tomorrow") are either true or false when spoken today. This compatibilist free will should not be understood as the ability to choose differently in an identical situation. A compatibilist may believe that a person can decide between several choices, but the choice is always determined by external factors. If the compatibilist says "I may visit tomorrow, or I may not", he is saying that he does not know what he will choose—whether he will choose to follow the subconscious urge to go or not.
Non-naturalism
Alternatives to strictly
naturalist physics, such as
mind–body dualism
In the philosophy of mind, mind–body dualism denotes either the view that mental phenomena are non-physical, Hart, W. D. 1996. "Dualism." pp. 265–267 in ''A Companion to the Philosophy of Mind'', edited by S. Guttenplan. Oxford: Blackwell. ...
positing a mind or soul existing apart from one's body while perceiving, thinking, choosing freely, and as a result acting independently on the body, include both traditional religious metaphysics and less common newer compatibilist concepts.
Also consistent with both autonomy and
Darwinism
Darwinism is a theory of biological evolution developed by the English naturalist Charles Darwin (1809–1882) and others, stating that all species of organisms arise and develop through the natural selection of small, inherited variations that ...
, they allow for free personal agency based on practical reasons within the laws of physics. While less popular among 21st-century philosophers, non-naturalist compatibilism is present in most if not almost all religions.
Criticism

A prominent criticism of compatibilism is
Peter van Inwagen
Peter van Inwagen (; born September 21, 1942) is an American analytic philosopher and the John Cardinal O'Hara Professor of Philosophy at the University of Notre Dame. He is also a Research Professor of Philosophy at Duke University each spring ...
's
consequence argument.
Critics of compatibilism often focus on the definitions of free will: incompatibilists may agree that the compatibilists are showing ''something'' to be compatible with determinism, but they think that this ''something'' ought not to be called "free will". Incompatibilists might accept the "freedom to act" as a ''necessary'' criterion for free will, but doubt that it is ''sufficient''. The incompatibilists believe that free will refers to ''genuine'' (i.e., absolute, ultimate, physical) alternate possibilities for beliefs, desires, or actions,
rather than merely
counterfactual ones.
Compatibilism is sometimes called soft determinism (
William James
William James (January 11, 1842 – August 26, 1910) was an American philosopher, historian, and psychologist, and the first educator to offer a psychology course in the United States.
James is considered to be a leading thinker of the la ...
's term) pejoratively.
James accused them of creating a "quagmire of evasion" by stealing the name of freedom to mask their underlying determinism.
[James, William. 1884 "The Dilemma of Determinism", ''Unitarian Review'', September 1884. Reprinted in ''The Will to Believe'', Dover, 1956, p. 149.] 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 aes ...
called it a "wretched subterfuge" and "word jugglery".
[Kant, Immanuel 1788 (1952).''The Critique of Practical Reason'', in ''Great Books of the Western World'', vol. 42, Kant, University of Chicago, p. 332.] Kant's argument turns on the view that, while all empirical phenomena must result from determining causes, human thought introduces something seemingly not found elsewhere in nature—the ability to conceive of the world in terms of how it ''ought'' to be, or how it might otherwise be. For Kant, subjective reasoning is necessarily distinct from how the world is empirically. Because of its capacity to distinguish ''is'' from ''ought'', reasoning can "spontaneously" originate new events without being itself determined by what already exists.
[Kant, Immanuel 1781 (1949). ''The Critique of Pure Reason'', trans. Max Mueller, p. 448.] It is on this basis that Kant argues against a version of compatibilism in which, for instance, the actions of the criminal are comprehended as a blend of determining forces and free choice, which Kant regards as misusing the word ''free''. Kant proposes that taking the compatibilist view involves denying the distinctly subjective capacity to re-think an intended course of action in terms of what ''ought'' to happen.
See also
*
Ash'ari
Ashʿarī theology or Ashʿarism (; ar, الأشعرية: ) is one of the main Sunnī schools of Islamic theology, founded by the Muslim scholar, Shāfiʿī jurist, reformer, and scholastic theologian Abū al-Ḥasan al-Ashʿarī in the 9 ...
*
Libertarianism (metaphysics)
Libertarianism is one of the main philosophical positions related to the problems of free will and determinism which are part of the larger domain of metaphysics. In particular, libertarianism is an incompatibilist position which argues that fre ...
*
Semicompatibilism
References
External links
Stanford Encyclopedia of Philosophy entry on Compatibilism
{{Determinism
Determinism
Free will
Metaphysical theories