Philosophers
Aristotle
Introduction Aristotle (384–322 BCE) transformed legal philosophy by grounding it in empirical observation and systematic classification. His Nicomachean Ethics and Politics provide the first …
H.L.A. Hart
Introduction H.L.A. Hart (1907–1992) transformed Anglo-American jurisprudence with The Concept of Law (1961), widely regarded as the most important work of legal philosophy in the twentieth century. …
Hans Kelsen
Introduction Hans Kelsen (1881–1973) was the most rigorous legal positivist of the twentieth century and the architect of the Pure Theory of Law (Reine Rechtslehre). He sought to establish …
Jean-Jacques Rousseau
Introduction Jean-Jacques Rousseau (1712–1778) developed the most radical and influential theory of popular sovereignty in the Enlightenment. His The Social Contract (Du Contrat Social, 1762) argues …
Jeremy Bentham
Introduction Jeremy Bentham (1748–1832) was the founder of utilitarianism and a pivotal figure in the development of legal positivism. He subjected the common law to devastating critique, argued for …
John Austin
Introduction John Austin (1790–1859) was the first systematic exponent of analytical jurisprudence and the figure most closely associated with the command theory of law. His The Province of …
John Locke
Introduction John Locke (1632–1704) transformed legal and political philosophy through his theory of natural rights, limited government, and the right of revolution. His Two Treatises of Government …
Karl Marx
Introduction Karl Marx (1818–1883) did not develop a systematic legal philosophy, but his critique of law as part of the ideological superstructure of capitalism has profoundly influenced legal …
Lon Fuller
Introduction Lon L. Fuller (1902–1978) developed a distinctive procedural version of natural law theory in response to the legal positivism of H.L.A. Hart. In The Morality of Law (1964), Fuller argued …
Max Weber
Introduction Max Weber (1864–1920) founded the sociology of law as a systematic discipline. In Economy and Society (Wirtschaft und Gesellschaft), he analyzed law as a dimension of social action, …
Montesquieu
Introduction Charles-Louis de Secondat, Baron de Montesquieu (1689–1755), was the preeminent Enlightenment theorist of constitutional design. His magnum opus, The Spirit of the Laws (De l’Esprit …
Plato
Introduction Plato (c. 428–348 BCE) stands as the foundational figure in Western legal philosophy. His dialogues The Republic and The Laws established the central questions of jurisprudence: What is …
Ronald Dworkin
Introduction Ronald Dworkin (1931–2013) developed the most powerful critique of legal positivism and the most distinctive alternative theory of law: law as integrity. Taking aim at H.L.A. Hart’s …
Thomas Aquinas
Introduction Thomas Aquinas (c. 1225–1274) synthesized Aristotelian philosophy with Christian theology to produce the most influential account of natural law in the Western tradition. His treatment of …
Thomas Hobbes
Introduction Thomas Hobbes (1588–1679) revolutionized legal philosophy by grounding law in sovereign command rather than in nature or divine will. His masterpiece Leviathan (1651) provided a …