227 thinkers, books, and ideas connected to this field.
Aldo Leopold's lyrical combination of nature writing and philosophical argument, culminating in the land ethic — the extension of ethical consideration to the biotic community as a whole.
John Rawls's 1971 masterwork — arguing that just institutions are those principles we would choose behind a 'veil of ignorance' (not knowing our position in society) — that rational choosers would select two principles: equal basic liberties for all, and inequalities only if they benefit the least advantaged (the difference principle).
David Hume's comprehensive philosophical system applying Newtonian method to human nature, covering the understanding (belief, causation), the passions, and morals.
Mary Wollstonecraft's argument that women possess the same rational capacities as men and are entitled to the same rights, and that their apparent inferiority results from defective education.
British philosopher who brought logical empiricism to English audiences in Language, Truth and Logic and developed emotivism — moral statements express emotions rather than stating facts.
American philosopher who has developed a theory of asshole ethics — a philosophically serious analysis of a common social type — and contributed to political philosophy and the ethics of surfing.
American philosopher who has worked on the relationship between fiction and emotion, the paradox of tragedy, and moral psychology.
Medieval theological concept — one of the seven deadly sins — denoting a spiritual listlessness or torpor that prevents the monk or soul from engaging in necessary spiritual work; analyzed as more than laziness, it is a metaphysical dejection about one's spiritual condition.
Scottish philosopher who revitalized virtue ethics with After Virtue — a sweeping critique of Enlightenment moral philosophy arguing that modern ethics has lost the teleological framework that made moral discourse coherent.
American ecologist and conservationist who developed the land ethic — the extension of moral community to include soils, waters, plants, and animals — and founded the science of wildlife management.
British philosopher and YouTuber (Cosmic Skeptic) who engages with religious arguments, moral philosophy, and secular ethics — notable for his willingness to engage with sophisticated religious and philosophical arguments at a high level rather than popular atheism's typical level.
Philosopher and AI researcher at Anthropic who works on AI alignment and character — particularly the design of Claude's values, personality, and approach to difficult conversations — previously at OpenAI and known for work on RLHF and AI character.
Indian economist and philosopher who developed the capabilities approach to human development, contributed to social choice theory, and has been a central figure in political philosophy of development.
Francis Hutcheson's foundational work arguing that beauty and virtue are perceived through distinct internal senses — not derived from reason or self-interest — and prefiguring utilitarian moral calculus.
The compilation of Confucius's sayings and conversations assembled by his disciples over several generations — the foundational text of Confucianism.
English philosopher (3rd Earl of Shaftesbury) who developed the moral sense — an innate natural capacity for distinguishing virtue from vice analogous to aesthetic taste — and identified virtue with natural affection and harmony.
The philosophical position that it is morally wrong to bring new persons into existence, typically because life involves more suffering than benefit or because consent cannot be obtained from potential persons.
Philosopher of Ascalon who ended Academic Skepticism by arguing that the Old Academy, Aristotle, and the Stoics share a common philosophy — founding the eclectic synthesis that dominated later Roman philosophy.
Athenian philosopher, student of Socrates, generally regarded as the founder or forerunner of Cynicism, who argued for virtue as the sole good and radical self-sufficiency.
Nigerian philosopher who has worked on African metaphysics, ethics, and the meaning of life from an African philosophical perspective.
Early Stoic philosopher and student of Zeno of Citium who argued for a more radical Stoicism — eliminating the distinctions between 'preferred' and 'dispreferred' indifferents that most Stoics maintained — taking the position that virtue alone matters, with no graded scale of external goods.
Ancient Greek philosopher — student of Plato — founder of the Lyceum — who created formal logic, founded comparative biology, wrote foundational texts in ethics (Nicomachean Ethics), politics, rhetoric, poetics, and physics — whose works dominated Western thought for 2000 years.
The warrior hero of the Mahabharata and the Bhagavad Gita — whose moral crisis at the battle of Kurukshetra provides the occasion for Krishna's philosophical and theological teachings.
New Zealand logician who founded tense logic — modal logic for time — and contributed to the philosophy of time and ethics.
British philosopher who worked on just war theory, nuclear deterrence, and the ethics of warfare.
Dutch philosopher — excommunicated from Amsterdam's Jewish community at 23 — author of the Ethics (written in geometric form) — who identified God with Nature (deus sive natura) and argued for determinism, the unity of substance, and the rational basis of freedom.
Dutch philosopher who developed a rigorous geometric metaphysics in which God and Nature are identical — the single infinite substance with infinite attributes — and derived a naturalistic ethics and liberal political theory.
Benjamin Constant was a French-Swiss political activist and liberal theorist who challenged Kant's absolute prohibition on lying and distinguished ancient from modern liberty.
English theologian and founding figure of Cambridge Platonism, known primarily through his sermons and aphorisms emphasizing the harmony of reason and faith.
British moral philosopher who wrote Ethics and the Limits of Philosophy and Shame and Necessity — arguing that systematic ethical theories (utilitarianism and Kantian ethics) fail to do justice to the complexity of moral life, and that integrity and ground projects are central to personal identity.
British philosopher who has developed ethicism about art — moral defects are aesthetic defects — and contributed to the philosophy of creativity.
The Better Business Bureau is an American nonprofit organization that rates businesses by reliability and honesty in commercial dealings.
David Benatar's philosophical defense of anti-natalism — the view that it is always a serious harm to bring a new person into existence — grounded in the asymmetry between pleasure and pain.
Philosophical analysis of boredom as a mood revealing the structure of temporality, desire, and meaning — treated by Pascal, Kierkegaard, Schopenhauer, and Heidegger as philosophically significant.
British philosopher who has developed and defended rule consequentialism — the best systematic account of the relationship between consequentialist reasoning and common-sense moral rules.
Ancient Indian philosopher and teacher (Siddhartha Gautama) who founded Buddhism, teaching the Four Noble Truths about suffering and its cessation, the doctrine of no-self (anatta), and the Eightfold Path as the means of liberation.
American pragmatist philosopher who invented modern modal logic (as an alternative to Russell-Whitehead's extensional logic) and developed a pragmatist epistemology based on the given in experience and conceptual schemes.
American philosopher who co-authored a widely used logic textbook with Copi and wrote against affirmative action from a liberal perspective.
Head of the New Academy who developed the most sophisticated ancient skepticism — arguing that no impression is cataleptic (certain) — and the doctrine of pithanon (probable/plausible) as a guide to action without certainty.
British philosopher and playwright who was one of the earliest public defenders of Locke's epistemology and developed an account of moral obligation grounded in reason and the nature of things.
Cecil Jacobson was an American fertility doctor convicted in 1992 of fraud and perjury for secretly using his own sperm to inseminate patients without their knowledge.
Song dynasty Neo-Confucian philosopher who co-founded with his brother Cheng Yi the school that placed li (principle) at the center of Neo-Confucian metaphysics.
Song dynasty Neo-Confucian philosopher who developed the concept of li (principle/pattern) as the metaphysical structure underlying all things and human moral nature — foundational for the Cheng-Zhu school.
Greek philosopher who became the third head of the Stoic school and systematized its logic, physics, and ethics into a comprehensive philosophical system.
Roman orator, statesman, and philosopher who synthesized Greek philosophy for a Latin audience and whose translations and adaptations transmitted Greek philosophical terminology to the Western tradition.
Italian philosopher working on human rights and the theory of international justice.
Greek philosopher who succeeded Zeno as head of the Stoic school, known for emphasizing the theological and cosmological dimensions of Stoicism.
The dominant ethical and political tradition in Chinese civilization, founded by Confucius and developed by Mencius, Xunzi, and later Neo-Confucians, emphasizing ritual propriety, filial piety, virtue cultivation, and benevolent government.
Ancient Chinese philosopher and educator who founded Confucianism — the tradition centered on ritual propriety, benevolence, filial piety, and the cultivation of virtue as the basis of social and political order.
Kant's Critique of Practical Reason (1788) establishes the rational foundations of morality and argues for the postulates of practical reason — God, freedom, and immortality.
Ancient philosophical movement founded by Antisthenes and radicalized by Diogenes of Sinope, holding that virtue consists in living according to nature and reason, and that convention, wealth, honor, and social institutions are obstacles to the good life.
Ancient philosophical school founded by Aristippus of Cyrene holding that pleasure — specifically bodily pleasure in the present moment — is the only intrinsic good.
Qing dynasty philosopher and philologist who critiqued Neo-Confucian metaphysics — particularly the principle-desire (li-yu) opposition — arguing that principles are discovered through desires and feelings, not opposed to them.
English philosopher and daughter of Ralph Cudworth who was a close associate of John Locke and developed a Lockean rational virtue ethics emphasizing women's education.
The foundational text of Daoism, attributed to Laozi, consisting of 81 short chapters presenting the Dao as the ineffable source of all things and wu wei as the proper mode of human and political action.
Chinese philosophical tradition based on the Daodejing and Zhuangzi, emphasizing harmony with the Dao (the Way — the natural, spontaneous ordering of all things), non-action (wu wei), and the relativity of conventional distinctions.
South African philosopher who developed the most rigorous contemporary defense of anti-natalism — the view that coming into existence is always a serious harm — and has written on misanthropy, animal ethics, and the human predicament.
American philosopher who has defended moral realism and developed a perfectionistic version of consequentialism, drawing on Mill.
Scottish philosopher who pushed empiricism to its skeptical limits, arguing that reason cannot justify belief in causation, induction, the external world, or a persistent self — and developed a sentiment-based moral philosophy.
British philosopher who has worked on the normativity of belief, the ethics of promising and commitment, and the relationship between epistemic and practical norms.
David Schmidtz is an American philosopher at the University of Arizona known for his pluralist account of justice and defense of market institutions.
British philosopher who developed the sortal theory of identity and persistence — objects persist as the same only relative to a sortal concept — and has argued for a cognitivist view of ethics.
Justus Lipsius's 1584 dialogue arguing for Stoic constancy as the response to the political chaos of the religious wars — the 'constant man' maintains inner stability regardless of external turmoil — which launched the Neo-Stoic movement of the late 16th and 17th centuries.
Cicero's dialogue On the Ends of Good and Evil — a comprehensive survey of the main Hellenistic ethical theories (Epicurean, Stoic, New Academic) presenting the best arguments for each.
A medieval ethical text in the de moribus (on customs/morals) tradition — typically a compilation of moral maxims and precepts for practical guidance.
Jane Addams's argument that ethics must be democratic and social — emerging from the experience of living with diverse others — rather than derived from abstract individual principles.
British moral philosopher whose Reasons and Persons is one of the most original works of 20th-century moral philosophy — arguing that personal identity is not what matters, and developing population ethics.
German Lutheran pastor and theologian who participated in the resistance to National Socialism and was executed by the Nazis, and whose prison writings developed the concept of religionless Christianity.
Ancient Greek Cynic philosopher who lived in deliberate poverty, rejected all social conventions, and used shamelessness and humor to expose the pretensions of conventional civilization.
Scholar of Cicero's ethical and political philosophy who has contributed translations and studies of On Duties and related works.
The philosophical and social movement holding that one should use evidence and reasoning to determine how to do the most good — treating all lives as equally valuable and directing resources toward the highest-impact interventions.
Elizabeth Anderson is an American philosopher at the University of Michigan known for her democratic equality theory and her critique of markets in reproductive and other personal spheres.
British philosopher — pupil and literary executor of Wittgenstein — author of Intention (1957) and Modern Moral Philosophy (1958) — who coined the term 'consequentialism,' revived virtue ethics, and created the philosophy of action.
Elizabeth Stern was the adoptive mother in the Baby M case who sought to enforce the surrogacy contract against surrogate mother Mary Beth Whitehead.
Ellen Goodman is an American journalist and Pulitzer Prize-winning columnist who wrote for The Boston Globe for over 40 years on social, ethical, and political issues.
Arrian's short handbook (Enchiridion = 'handbook') summarizing Epictetus's teaching — 53 short sections on Stoic practice — beginning with the foundational distinction between what is in our power and what is not.
Greek Stoic philosopher born into slavery who became a freed philosopher in Rome — whose Discourses (recorded by his student Arrian) and Enchiridion (handbook) are the most practically oriented Stoic texts — and whose core distinction (what is up to us vs. what is not) is the foundation of Stoic practice.
Ancient Greek philosopher who founded Epicureanism — the pursuit of eudaimonia through ataraxia (tranquility) and aponia (absence of pain) — grounded in materialist atomism and the rejection of divine Providence.
American philosopher who has worked on agent-relative reasons and the structure of practical rationality.
Baruch Spinoza's masterwork written in geometric form — definitions, axioms, propositions, proofs — deriving metaphysics, philosophy of mind, theory of the emotions, and ethics from first principles about substance.
American philosopher who has contributed to the analysis of consequentialism and trolley-type cases.
Sartre's popular lecture defending existentialism against the charges that it is pessimistic and anarchic, arguing that radical freedom entails radical responsibility and a commitment to all of humanity.
The foundational teaching of Buddhism: (1) dukkha (suffering/unsatisfactoriness is pervasive); (2) its origin is craving (tanha); (3) cessation (nirodha) is possible; (4) the Eightfold Path is the way to cessation.
Irish-Scottish philosopher who developed the moral sense theory — humans have an innate faculty for perceiving moral qualities — and the utilitarian formula that the best action produces the greatest happiness for the greatest number.
German-Austrian philosopher who revived the scholastic concept of intentionality — the directedness of mental states toward objects — as the defining mark of the mental, founding phenomenology.
German philosopher who has worked on formal logic, philosophy of language, and the foundations of ethics, contributing to German analytic philosophy.
American philosopher who developed a careful defense of hedonism in ethics and a comparative account of when death is bad for the person who dies.
German philosopher — who declared God is dead, introduced the will to power and eternal recurrence, described the Übermensch as a post-nihilistic ideal, and critiqued Socratic rationalism, Christian morality, and the herd mentality — one of the most influential and misappropriated thinkers in history.
G. E. Moore was a British philosopher whose Principia Ethica launched 20th-century analytic ethics by arguing that 'good' is an indefinable non-natural property.
American philosopher who has made influential contributions to the philosophy of free will and moral responsibility — developing the valuing theory of free agency.
Finnish philosopher who founded modern deontic logic (the logic of obligation and permission), developed an action-theoretic approach to causation and explanation, and served as Wittgenstein's literary executor.
American philosopher at Princeton who works on ethics, cognitive science, and philosophy of language — known for his arguments for moral relativism and for his work on the relationship between moral philosophy and empirical psychology.
British philosopher who has worked on the problem of evil, the moral significance of evolutionary debunking, and population ethics.
Kenyan philosopher who developed sage philosophy — the systematic philosophical thinking of traditional African sages — as a form of genuine philosophy, against both ethnophilosophy and universalism.
American philosopher who developed the hierarchical account of free will and the Frankfurt cases against the principle of alternate possibilities — and wrote On Bullshit, the most-read philosophical essay in history.
Guatemalan-American philosopher who contributed to the theory of indexicals (quasi-indexicals) and developed guise theory — a comprehensive ontology of propositional attitudes.
Claude Adrien Helvétius was a French Enlightenment philosopher who reduced all human motivation to self-interest and sensation, a view that directly shaped Bentham's utilitarian calculus.
American writer and philosopher who lived deliberately at Walden Pond, developed the theory of civil disobedience, and produced a philosophy of simplicity, wildness, and principled resistance to unjust authority.
Henry Sidgwick was a Victorian British philosopher who produced in The Methods of Ethics the most rigorous systematic treatment of utilitarian moral philosophy.
British philosopher who coined 'survival of the fittest,' developed a comprehensive synthetic philosophy extending evolutionary principles across all domains, and was the most widely read philosopher of the late 19th century.
Ancient Greek poet who produced the Theogony — the canonical account of the Greek gods' genealogy and the cosmos's origin — and Works and Days, a poem on agricultural labor and justice.
British philosopher who has defended the Everettian interpretation of quantum mechanics using decision theory and has contributed to population ethics and global priorities research.
German philosopher — author of the Critique of Pure Reason, Groundwork of the Metaphysics of Morals, and Critique of Judgment — who created the Copernican Revolution in philosophy (that mind structures experience rather than simply receiving it) — whose categorical imperative is the most influential deontological ethics.
Irish-British philosopher and novelist — author of Under the Net, The Sea the Sea (Booker Prize), and The Sovereignty of Good — who combined philosophy (Platonic ethics, moral psychology) and fiction in a unique way — died of Alzheimer's disease.
British-American philosopher who has written extensively on ancient Greek ethics, Platonism, and Stoicism, arguing for the contemporary relevance of virtue ethics.
This is likely a reference to Ralph Cudworth, Cambridge Platonist philosopher who wrote The True Intellectual System of the Universe arguing against atheism and materialism.
American philosopher who contributed to deontic logic — particularly through the 'gentle murder' puzzle that exposes problems with standard deontic logic.
Jason Brennan is an American philosopher at Georgetown University who defends libertarian political theory and argues for replacing universal suffrage with epistocracy.
American political theorist who wrote on Jane Addams, just war theory, and the relationship between politics and theology — a communitarian feminist who defended traditional family structures.
First-century Jewish preacher and central figure of Christianity — whose teachings on love, forgiveness, and the Kingdom of God were recorded in the Gospels — and whose movement grew from a small group of followers to the world's largest religion over two millennia.
First-century Jewish preacher from Galilee — the central figure of Christianity — whose teachings, crucifixion, and claimed resurrection became the foundation of the world's largest religion, and who for René Girard represents the unique moment in history when the scapegoat victim's innocence is proclaimed by the text that recounts his death.
First-century Jewish preacher from Galilee — whose teachings (the Sermon on the Mount, the parables, radical love of enemy, forgiveness, service) became the foundation of Christianity — crucified by Roman authorities under Pontius Pilate.
Hungarian-American economist and philosopher who provided game-theoretic foundations for utilitarianism and defended rule utilitarianism independently of Rawls's veil of ignorance argument.
American scholar of ancient Greek philosophy who has contributed authoritative studies of Plato, Aristotle, and Hellenistic ethics, including the Complete Works of Plato edition.
British philosopher who has written the definitive study of John Stuart Mill and developed a neo-Millian account of normative reasons.
American philosopher who has worked on privacy law, women and the law, and contributed to deontic logic.
American philosopher who became famous for the violinist thought experiment defending abortion rights and for developing the trolley problem into the central test case for deontological ethics.
American philosopher who has worked on natural law theory, philosophy of information, and the ethics of artificial intelligence.
American philosopher who argued that moral considerability (being morally considerable, having interests worth considering) should be extended to all living things and has contributed to business ethics.
Central divine teacher of the Bhagavad Gita — the avatar of Vishnu who reveals the Gita's philosophical teachings to Arjuna on the battlefield of Kurukshetra.
Ghanaian-British-American philosopher who has argued against racial essentialism, developed a pluralist cosmopolitanism, and engaged with African philosophy, identity, and honor cultures.
Ghanaian philosopher who developed systematic philosophical analyses of Akan thought and culture, defending a moderate communitarianism that balances communal values with individual rights.
A. J. Ayer's influential introduction to logical empiricism arguing for the verificationist criterion of meaning and emotivism about ethics.
British philosopher who contributed to the philosophical analysis of trolley cases and the doctrine of double effect.
Semi-legendary Chinese philosopher traditionally credited as the author of the Daodejing and the founder of philosophical Daoism.
Russian novelist who wrote War and Peace, Anna Karenina, and The Death of Ivan Ilyich — widely considered among the greatest novelists who ever lived — who in his later life underwent a religious conversion and became an anarcho-pacifist Christian moralist, influencing Gandhi and Tolstoyan movements worldwide.
Seneca's collection of 124 letters to his friend Lucilius — written 62–65 CE — covering time, death, friendship, virtue, and wealth — the most readable Stoic philosophical text.
Australian-American philosopher who has worked on the demands of beneficence, the cooperative principle, and the philosophy of tax.
Dworkin's philosophical treatment of abortion and euthanasia — arguing that both sides in both debates are really arguing about the 'sanctity of life' (an intrinsic value) rather than about rights.
American philosopher working on global health ethics and the ethics of migration.
The ethical position that we should give significant moral weight to the welfare of future generations — and that since the potential future population vastly outnumbers those alive today, reducing existential risks is among the most important moral priorities.
Roman Epicurean philosopher and poet who wrote De Rerum Natura — the most sustained and beautiful Latin philosophical poem — presenting Epicurean atomism as a liberation from the fear of gods and death.
American philosopher who has worked on inferentialism, normative pragmatics, and the relationship between language and ethics.
Mary Beth Whitehead was the surrogate mother in the Baby M case who refused to surrender the child she had borne, precipitating a landmark legal battle over commercial surrogacy.
British political philosopher who argued in A Vindication of the Rights of Woman that women's apparent irrationality is a product of deficient education, not natural incapacity, and that women are entitled to the same rational autonomy as men.
American philosopher who has worked on Jane Addams's social ethics and developed an embodied account of care ethics.
German philosopher who directed the Institute for Social Research and co-developed Frankfurt School critical theory with Theodor Adorno.
Marcus Aurelius's private philosophical journal — written in Greek to himself during military campaigns — never intended for publication — which is now the most read Stoic text and one of the most read philosophy books in history.
Confucian philosopher who argued that human nature is innately good — the four sprouts of virtue are present in all — and developed a theory of benevolent government grounded in this moral psychology.
Plato's dialogue in which Socrates and Meno investigate whether virtue can be taught — leading to the theory of recollection (anamnesis) as an answer to Meno's paradox about inquiry.
Sidgwick's Methods of Ethics (1874) is the most rigorous systematic treatment of utilitarian moral philosophy, identifying three methods of ethics and the irresolvable dualism of practical reason.
American philosopher who has developed a basic goods theory of ethics and written on ancient medicine and Hippocratic ethics.
American philosopher who developed the planning theory of intention — intentions as future-directed plans that coordinate action over time — and has worked on shared intention and agency.
American philosopher at University of Colorado Boulder — author of The Problem of Political Authority, Skepticism and the Veil of Perception, and Ethical Intuitionism — the most rigorous philosophical anarchist in contemporary Anglo-American philosophy.
American political philosopher at Harvard whose Justice course became one of the most watched online lectures in history, and who has written influentially on the limits of markets and liberal neutrality.
American philosopher who identified the problem of moral schizophrenia in modern ethics and developed an account of plural and conflicting values in moral life.
Australian philosopher who has contributed to the analysis of causation, defended the A-theory of time, and argued for a permissive view of abortion.
American political philosopher who developed the communitarian critique of Rawlsian liberalism and wrote the most influential 20th-century work on just war theory.
Ancient Chinese philosopher and founder of Mohism, who argued for universal, impartial love (jian ai) as the solution to social disorder, opposing Confucian role-based ethics with a proto-utilitarian framework.
South African philosopher who has worked on personhood, moral status, and ubuntu ethics in the African philosophical tradition.
Chinese philosopher who founded Mohism — opposing Confucianism — with the doctrine of jian ai (universal, impartial love), consequentialist ethics, and active opposition to aggressive warfare.
Roman Stoic philosopher and teacher who was Epictetus's teacher — the 'Roman Socrates' — and who taught that philosophy is not merely theoretical but a practical daily discipline, that women should receive the same philosophical education as men, and that manual labor is compatible with philosophy.
English Cambridge Platonist philosopher who attempted to reconcile Calvinist theology with rational moral philosophy in his major work An Elegant and Learned Discourse of the Light of Nature.
American philosopher working on evolutionary approaches to ethics and the philosophy of biology.
Aristotle's foundational treatise on ethics — arguing that the good life (eudaimonia, flourishing) consists of virtuous activity in accordance with reason — that virtues are habits cultivated through practice rather than rules to follow — and that the good life requires external goods and social context.
Seneca's three-book treatise De Ira (On Anger) — the most systematic ancient treatment of anger — arguing that anger is never useful, that it degrades the person who feels it, and providing practical techniques for avoiding and extinguishing it.
Cicero's De Officiis — a letter to his son and the most widely read Latin philosophical work in history — developing practical Stoic ethics around the four cardinal virtues and the concept of appropriate action (officium).
Mill's On Liberty (1859) is the definitive liberal statement of individual freedom, grounding liberty in the harm principle and defending intellectual diversity as essential to truth.
Friedrich Nietzsche's 1887 polemical essay — tracing the historical origins of moral concepts (good/evil, guilt, bad conscience, ascetic ideals) and arguing that conventional morality is a slave revolt against aristocratic values — his most systematic philosophical work.
Lucretius's six-book Latin poem presenting Epicurean atomism — the universe is atoms and void, the soul is mortal, the gods are indifferent — as the philosophical cure for religious terror.
Middle Stoic philosopher from Rhodes who adapted Stoicism to Roman aristocratic life, moderating the rigidity of early Stoicism and influencing Cicero's On Duties.
Canadian philosopher who founded neurophilosophy — the application of neuroscience to philosophical problems about mind, self, and morality — and has argued for a naturalistic account of conscience.
American philosopher who has worked on conditional obligation, practical reasons, and moral psychology — arguing that emotions play a genuine rational role in moral reasoning.
American philosopher who has worked on deontic logic and the logic of supererogation — actions that are praiseworthy but not required.
American philosopher who argued that corporations are genuine moral persons — capable of acting and being held morally responsible — on the basis of their internal decision structures.
British analytic philosopher who made foundational contributions to the logic of predicates and ethical theory, including the Geach-Frege point about the embedding of moral terms in unasserted contexts.
Australian philosopher who applied utilitarian reasoning to animal welfare, world poverty, and bioethics — becoming the most practically influential living philosopher and a founder of the effective altruism movement.
British philosopher at Oxford — who created the Trolley Problem as a philosophical thought experiment — revived virtue ethics against utilitarianism and Kantian deontology — and created the theory of natural goodness in Natural Goodness.
Hegel's 1820 treatise on right, morality, ethical life, and the state — arguing that freedom is realized through rational institutions (family, civil society, state) and that the state is the highest embodiment of ethical life — including the famous preface line 'The real is the rational and the rational is the real.'
Jansenist theologian and moralist who co-authored the Port-Royal Logic with Antoine Arnauld and analyzed the role of self-love (amour-propre) in social morality.
1940 Disney animated film in which wooden puppet Pinocchio must prove himself brave, truthful, and unselfish to become a real boy — and whose lies make his nose grow — a narrative Peterson reads as the mythological map of conscience formation.
Rawls's Political Liberalism (1993) revises A Theory of Justice by grounding justice in political not metaphysical claims, responding to communitarian and other critics.
Ancient Greek philosopher who founded Pyrrhonism — the most radical ancient skeptical tradition — advocating suspension of judgment about all matters to achieve ataraxia (tranquility).
Wes Hazard's comedic question book — posing ethical dilemmas and absurd scenarios for conversation.
German political philosopher who has developed a Kantian critical theory grounded in the right to justification — every exercise of power must be justifiable to those over whom it is exercised.
English philosopher and major Cambridge Platonist who wrote the most systematic refutation of atheistic materialism of the 17th century and developed a theory of plastic nature.
British philosopher who has worked on the nature of normative reasons, practical and theoretical rationality, and the relationship between ethics and metaethics.
Plato's masterwork — a dialogue in which Socrates and interlocutors investigate the nature of justice, concluding that justice in the city (philosopher-kings ruling warriors and producers) mirrors justice in the soul (reason ruling spirit and appetite) — while developing the theory of Forms, the allegory of the Cave, and the ideal city.
American philosopher who developed a sophisticated version of rule utilitarianism grounded in an informed desire account of welfare.
Australian philosopher who has contributed to the analysis of the trolley problem and the sorites paradox.
American philosopher who has developed a sophisticated divine command theory of ethics, a modal metaphysics of essences, and contributed to the study of Leibniz.
Australian political philosopher who has developed a utilitarian theory of political institutions, the ethics of vulnerability, and contributed to democratic theory.
American philosopher who wrote the most influential philosophical defense of libertarianism, developed the tracking theory of knowledge, and made contributions across philosophy.
British moral philosopher who has defended hedonism, written influential studies of Mill, and contributed to virtue ethics and the history of moral philosophy.
British theologian and rationalist philosopher who argued for the a priori knowability of moral obligations from the nature of things and conducted the famous correspondence with Leibniz on space, time, and God.
American philosopher who has contributed to a sophisticated critique and reconstruction of consequentialism, developing the notion of agent-relative prerogatives.
Ralph Waldo Emerson's 1841 essay arguing that the individual must trust their own intuitions and refuse conformity to social expectations, tradition, and received authority — the foundational text of American individualist philosophy.
American philosopher who developed the Darwinian dilemma — evolutionary debunking of moral realism — and defends a constructivist metaethics.
Athenian philosopher — who left no writings — whose method of elenctic questioning (exposing inconsistency in interlocutors' beliefs) founded Western philosophy's commitment to rational self-examination — who was executed by Athens for impiety and corrupting the youth.
Walzer's Spheres of Justice (1983) develops a pluralist theory of justice in which each social good has its own distributive principle based on its shared social meaning.
Stanford University's interdisciplinary AI research institute — focused on the development and deployment of human-centered AI — producing influential AI Index reports and research on AI ethics, policy, and safety.
American philosopher who has developed the second-person standpoint as the foundation of morality — moral obligations are fundamentally addressed from one person to another.
Australian philosopher who has worked on the argument from authority in epistemology and on bioethics.
Hellenistic philosophical school founded by Zeno of Citium holding that virtue alone constitutes eudaimonia, that the universe is rational and providentially ordered, and that emotions contrary to reason are errors of judgment.
Thomas Aquinas's unfinished masterwork systematically treating all Christian doctrine through philosophical analysis — structured as objections, answers, and replies.
Swedish philosopher who has worked on deontic logic, the logic of preference, and their applications to ethical theory.
Danish philosopher and theologian who developed the existentialist account of authentic selfhood through the three stages of existence (aesthetic, ethical, religious) and attacked the systematic philosophy of Hegel as irrelevant to the individual's infinite passion.
Canadian philosopher working in South Africa who has contributed to philosophy of the meaning of life and developed a systematic African ethics based on ubuntu (communal relationality).
Boethius's dialogue with Lady Philosophy written while awaiting execution, arguing that Fortune is inherently fickle, that true goods (virtue, reason) are immune to Fortune's wheel, and that divine providence is compatible with human freedom.
Charles Darwin's extension of evolutionary theory to human beings, arguing that humans evolved from earlier primates, and developing the theory of sexual selection as a mechanism distinct from natural selection.
Nozick's The Examined Life (1989) is a collection of philosophical meditations on love, death, meaning, and the good life, written in a more accessible register than his technical works.
The Moral Maze is a long-running BBC Radio 4 discussion program that examines the ethical dimensions of current affairs through debate between panelists and witnesses.
A collection of moral maxims from the Roman mime-writer Publius Syrus — collected from his theatrical works — including many of the most durable Latin aphorisms.
Toby Ord's 2020 analysis of existential risks facing humanity — cataloguing threats (AI misalignment, engineered pandemics, nuclear weapons, climate change, asteroids) by probability and arguing that avoiding existential catastrophe is the highest moral priority.
Arthur Schopenhauer's masterwork arguing that the world is fundamentally will — blind, insatiable striving — and that salvation from suffering comes through aesthetic contemplation and ascetic denial.
American philosopher who argued that consciousness involves subjective experience that cannot be explained by objective physical descriptions, and developed accounts of moral luck, political philosophy, and the limits of objective reason.
New Zealand philosopher who has worked on rule consequentialism, the ethics of future generations, and the ethics of living in a broken world (after catastrophic climate change).
Swedish philosopher who has consistently defended hedonistic utilitarianism — including accepting the repugnant conclusion — and has written on political philosophy and the ethics of death.
The Taishang Ganying Pian (Tract of the Most Exalted on Action and Response) — one of the most widely circulated Daoist morality texts, teaching that Heaven rewards virtue and punishes vice through a cosmic accounting system.
Mill's Utilitarianism (1863) is the classic short defense of utilitarian ethics, introducing qualitative distinctions between pleasures and grounding morality in the principle of utility.
American philosopher who has worked on moral skepticism, informal logic, applied ethics, and the neuroscience of morality.
Ming dynasty Neo-Confucian philosopher who developed the School of Mind (xinxue) — mind is the ultimate reality — and the unity of knowledge and action: genuine knowledge necessarily issues in action.
Sandel's What Money Can't Buy (2012) examines the expanding role of markets in American life and argues that some goods are degraded or corrupted when bought and sold.
Will Kymlicka is a Canadian political philosopher who developed the liberal theory of minority rights and multicultural citizenship.
William Stern was the biological father in the Baby M case (1988), the first major American court case to evaluate the validity of commercial surrogacy contracts.
Xenocrates was a Greek philosopher who led Plato's Academy after Speusippus and systematized Platonic doctrine by introducing the tripartite division of philosophy into logic, physics, and ethics.
Confucian philosopher who opposed Mencius's optimism, arguing that human nature is originally bad — desires tend toward excess — and that ritual and education impose order on natural tendencies.
Cypriot-Greek philosopher who founded Stoicism after studying in Athens, teaching in the Stoa Poikile — the Painted Porch — from which the school takes its name.
Song dynasty philosopher who synthesized Neo-Confucianism into its definitive systematic form — the Cheng-Zhu school — which became the orthodox interpretation of Confucianism for six centuries.
Foundational Daoist philosophical text attributed to Zhuang Zhou, combining philosophical argument, parable, humor, and poetry to develop a perspectivism and naturalism that dissolves conventional distinctions.
Charles Taylor's The Ethics of Authenticity diagnoses three modern malaises — individualism, instrumental reason, and the soft despotism of technocratic politics — while arguing that authenticity is a genuine moral ideal that has been debased, not one to be abandoned. Taylor calls for recovering the moral horizon that gives authenticity its point.
Michael Huemer's Socratic dialogue arguing that factory farming is morally wrong and that consistent ethical principles require vegetarianism.
William MacAskill's popular defense of longtermism — arguing that future people matter morally, that the future could be astronomically large, and that we should therefore prioritize reducing existential risks.
Oxford philosopher who co-founded the effective altruism movement and 80,000 Hours — and whose later work on longtermism argues that reducing existential risk is the most pressing moral priority.
Galen Strawson is a British philosopher (son of P.F. Strawson) at the University of Texas at Austin, known for his influential work on panpsychism, the self, free will, and moral responsibility. His 2006 paper 'Realistic Monism: Why Physicalism Entails Panpsychism' helped revive serious academic interest in panpsychism.
Michael Hauskeller is a German-British philosopher at the University of Liverpool, known for his work on value theory, transhumanism, bioethics, and the philosophy of the good life. He has written on the ethics of enhancement, the nature of happiness, and the philosophy of science fiction.
Superman is the archetypal American superhero introduced by DC Comics in 1938, representing the ideal of selfless power used in service of justice. As a cultural concept, Superman embodies the fantasy of godlike capability constrained by moral commitment.