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Social & Cultural
Ideology, power, and how societies reproduce themselves.
- AlienationMarx's concept naming the structural condition under capitalism in which workers are estranged from the product of their labor, from the activity of labor, from their species-being, and from other workers.ConceptsPhilosophy19th Century
- Belief SystemsA set of beliefs held together so that each is supported by the others.ConceptsPhilosophyContemporary
- Charles Sanders PeirceThe American polymath who founded pragmatism with the 1878 paper How to Make Our Ideas Clear, made fundamental contributions to formal logic and semiotics, and produced one of the most original philosophical bodies of work in the nineteenth century — most of it published only after his death.FiguresPhilosophy19th Century
- Charles TaylorCanadian philosopher (b. 1931) whose work bridges analytic and continental traditions, whose Sources of the Self (1989) and A Secular Age (2007) are major works of philosophical history, and whose essays on multiculturalism and the politics of recognition have shaped late twentieth- and early twenty-first-century political theory.FiguresPhilosophyContemporary
- ConfessionsAugustine's autobiographical and philosophical work in thirteen books, the founding text of Western autobiography and one of the most influential single works in Latin Christian thought.BooksPhilosophy
- Critical TheoryThe twentieth-century tradition founded by the Frankfurt School Institute for Social Research that integrates Marxist analysis, Hegelian dialectic, Freudian psychoanalysis, and Weberian sociology into a critical theory of contemporary society.TraditionsPhilosophy20th Century
- Democracy and EducationDewey's 1916 systematic statement of progressive education theory, treating schools as miniature democratic communities and education as the cultivation of dispositions for inquiry-based participation rather than transmission of fixed content.BooksPhilosophy
- Dialectic of EnlightenmentThe 1947 work by Horkheimer and Adorno composed during their wartime California exile, developing the thesis that the Enlightenment project of emancipation through reason has produced its own opposite in the dominance of instrumental rationality and the culture industry.BooksPhilosophy
- Discipline and PunishFoucault's 1975 genealogical history of the European penal system that analyzed the transformation from the spectacle of public execution to the disciplinary techniques of the modern prison, developing the concepts of discipline, surveillance, and the Panopticon.BooksPhilosophy
- Emmanuel LevinasThe French-Lithuanian philosopher whose work recentered phenomenology on the ethical encounter with the Other, made ethics first philosophy, and produced one of the most distinctive philosophical projects of the postwar period.FiguresPhilosophy20th Century
- Essay Concerning Human UnderstandingLocke's foundational work of modern empiricism, in four books, arguing against innate ideas and developing the doctrine that all knowledge derives from sensation and reflection.BooksPhilosophy
- Fear and TremblingKierkegaard's 1843 pseudonymous work on Abraham, the binding of Isaac, the teleological suspension of the ethical, and the nature of faith — the founding text of religious existentialism.BooksPhilosophy
- Friedrich NietzscheThe German philosopher and philologist whose late nineteenth-century works on morality, religion, art, and the will to power produced one of the most influential and most contested philosophical bodies of work in modern thought.FiguresPhilosophy19th Century
- G.W.F. HegelThe German Idealist philosopher whose dialectical system attempted to articulate the unfolding of absolute spirit through history, nature, and consciousness as a single rational structure.FiguresPhilosophy19th Century
- George BerkeleyThe Anglo-Irish bishop and philosopher whose subjective idealism — esse est percipi, to be is to be perceived — took empiricism to its most radical conclusion: there are no material substances, only ideas and the minds that perceive them.FiguresPhilosophyEnlightenment
- Herbert MarcuseThe German-American philosopher who joined the Frankfurt Institute in exile, developed a synthesis of Freud and Marx in Eros and Civilization, produced the canonical New Left critique of advanced industrial society in One-Dimensional Man, and became the most publicly visible Frankfurt School thinker.FiguresPhilosophy20th Century
- How to Make Our Ideas ClearPeirce's 1878 Popular Science Monthly paper containing the founding statement of the pragmatic maxim and the central methodological proposal of the pragmatist tradition.BooksPhilosophy
- Identity ReconstructionThe structural process of rebuilding the self after a load-bearing belief system has collapsed, treated not as a cognitive update but as a re-architecting of the framework through which selfhood and meaning are organized.ConceptsTransitionsContemporary
- Jacques DerridaThe French-Algerian philosopher who founded deconstruction, transformed the study of writing and the metaphysics of presence, and produced one of the most influential bodies of late-twentieth-century continental philosophy across philosophy, literature, law, and the broader humanities.FiguresPhilosophy20th Century
- John DeweyThe American philosopher who developed pragmatism into a systematic philosophy of inquiry, experience, education, and democracy across more than seventy years of continuous publication — the most institutionally consequential American philosopher of the twentieth century.FiguresPhilosophy20th Century
- John LockeThe English philosopher whose Essay Concerning Human Understanding founded modern empiricism and whose Two Treatises of Government provided the philosophical foundation of liberal political theory.FiguresPhilosophyEnlightenment
- John Stuart MillThe English philosopher, economist, and reformer whose work on utilitarian ethics, the philosophy of liberty, the logic of inductive reasoning, and the subjection of women shaped Victorian and modern liberal thought.FiguresPhilosophy19th Century
- Jürgen HabermasThe German philosopher and sociologist who led the second generation of the Frankfurt School, developed the theory of communicative action and discourse ethics, and remains the most institutionally influential living German philosopher.FiguresPhilosophy20th Century
- Ludwig WittgensteinThe Austrian-British philosopher whose two distinct phases — the picture theory of the Tractatus (1921) and the language-games of the Philosophical Investigations (1953) — each defined a distinct period of twentieth-century analytic philosophy.FiguresPhilosophy20th Century
- MarxismThe substantial philosophical and political tradition founded by Marx and Engels that takes the analysis of historical material conditions, class structure, and economic production as the foundation of social theory and political practice.TraditionsPhilosophy19th Century
- Maurice Merleau-PontyThe French philosopher whose Phenomenology of Perception (1945) made the lived body the central category of phenomenology, produced the major French systematic phenomenological work of the century, and shaped twentieth-century theories of embodiment, perception, and political agency.FiguresPhilosophy20th Century
- Max HorkheimerThe German philosopher and social theorist who founded the program of critical theory at the Frankfurt Institute for Social Research, co-authored the Dialectic of Enlightenment with Adorno, and shaped the entire trajectory of twentieth-century critical social theory.FiguresPhilosophy20th Century
- Michel FoucaultThe French philosopher and historian whose archaeological and genealogical investigations of madness, medicine, the prison, and sexuality produced the most influential single body of work in late-twentieth-century continental philosophy.FiguresPhilosophy20th Century
- Of GrammatologyDerrida's 1967 founding work of deconstruction, developing the analysis of the Western metaphysics of presence through the critique of the privileging of speech over writing and introducing the concept of différance.BooksPhilosophy
- On the Genealogy of MoralityNietzsche's 1887 work of three essays analyzing the historical and psychological sources of moral judgment, organized around the contrast between aristocratic and slave moralities.BooksPhilosophy
- PhenomenologyThe twentieth-century tradition that takes the rigorous description of the structures of conscious experience — not its empirical psychology but its essential structures — as the foundation of philosophy.TraditionsPhilosophy20th Century
- Philosophical InvestigationsWittgenstein's posthumous 1953 masterwork developing the account of meaning as use, the analysis of language as practice organized into language-games, and the famous private language argument.BooksPhilosophy
- Post-structuralismThe body of French thought that accepted structuralism’s insight that meaning is relational and rejected its assumption that systems are stable, closed or analyzable from outside.TraditionsPhilosophyc. 1966–present
- PragmatismJames's 1907 book, from eight public lectures — the most readable statement of pragmatism, and the one whose loose formulation of truth gave its critics everything they needed.BooksPhilosophy
- PragmatismThe American tradition holding that the meaning of a concept lies in its practical consequences, and the truth of a belief in its capacity to work — to help us cope, predict, and act.TraditionsPhilosophy20th Century
- Søren KierkegaardThe Danish philosopher and theologian whose pseudonymous works on anxiety, despair, faith, and the existing individual founded the existentialist tradition and reshaped Christian theology.FiguresPhilosophy19th Century
- StructuralismThe approach holding that meaning arises from relations within a system rather than from the elements themselves, applied first to language and then to myth, kinship and culture.TraditionsPhilosophyc. 1916–1968
- The Streisand effectAn attempt to suppress information that draws far more attention to it than leaving it alone would have.ConceptsBusiness
- The Varieties of Religious ExperienceJames's 1902 Gifford Lectures: a typology and analysis of religious experience treated empirically rather than doctrinally, organized around case material from autobiography and devotional literature and arguing for the experiential reality and pragmatic fruits of religion independent of theological commitment.BooksPhilosophy
- Theodor AdornoThe German philosopher, sociologist, and musicologist who co-authored the Dialectic of Enlightenment with Horkheimer, produced the canonical works of Frankfurt School critical theory in his own name (Negative Dialectics, Aesthetic Theory, Minima Moralia), and shaped twentieth-century continental philosophy as the most substantial individual theorist of the first generation.FiguresPhilosophy20th Century
- Tractatus Logico-PhilosophicusWittgenstein's 1921 treatise organized as numbered propositions developing the picture theory of meaning and ending with the famous injunction that what cannot be spoken about must be passed over in silence.BooksPhilosophy
- Walter BenjaminThe German-Jewish critic and philosopher whose essays on art, history, language, and Paris produced one of the most distinctive bodies of twentieth-century writing — a Frankfurt School affiliate whose work has shaped cultural studies, the philosophy of history, and the contemporary engagement with mass culture.FiguresPhilosophy20th Century
- William JamesThe American philosopher and psychologist whose work across pragmatism, the psychology of consciousness, religious experience, and radical empiricism made him the most influential single American philosophical voice of the late nineteenth and early twentieth centuries.FiguresPhilosophy19th Century