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Charles Sanders Peirce

1839–1914

A first way ina deliberate simplification – the portrait says more

The meaning of an idea lies in its practical effects, and knowledge grows by a community of inquirers testing and correcting itself.

Placement

Pragmatism & US Philosophy · North America · Logic, Epistemology, Language, Science

Founder of pragmatism and semiotics: the meaning of a concept lies in its practical consequences.

Key ideas

  • Pragmatic maxim
  • Semiotics
  • Abduction
  • Fallibilism

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Influence

Influenced by 4

  • Aristotle

    influenced by

    Peirce took his term ‘abduction’ for inference to an explanatory hypothesis from Aristotle’s apagoge in the Prior Analytics, setting it beside deduction and induction. Aristotle, Prior Analytics; SEP “Abduction”; SEP “Charles Sanders Peirce”

    Evidence: AI draft

    Aristotle › 384–322 BCE

  • John Duns Scotus

    influenced by

    Peirce called himself a Scotistic realist, defending against nominalism the reality of generals, and adapted Scotus’s haecceity, ‘thisness’, for his category of Secondness. J. F. Boler, Charles Peirce and Scholastic Realism (1963); C. S. Peirce, review of Fraser’s Berkeley (1871); SEP “Charles Sanders Peirce”

    Evidence: AI draft

    John Duns Scotus › c. 1266–1308

  • George Berkeley

    influenced by ✓

    Peirce reviewed Fraser’s edition of Berkeley’s Works (1871) and later, writing to James (1903), gave Berkeley more right than anyone to be called the introducer of pragmatism. C. S. Peirce, review of A. C. Fraser (ed.), The Works of George Berkeley, North American Review (1871); letter to W. James (1903); L. Friedman, “Pragmatism: The Unformulated Method of Bishop Berkeley”, Journal of the History of Philosophy (2003)

    Evidence: also in Wikidata · Wikidata

    George Berkeley › 1685–1753

  • Immanuel Kant

    influenced by

    Peirce studied the Critique of Pure Reason for years in his youth and took the name ‘pragmatism’ from Kant’s distinction between pragmatisch and praktisch (‘What Pragmatism Is’, 1905). C. S. Peirce, “What Pragmatism Is”, The Monist (1905); SEP “Charles Sanders Peirce”

    Evidence: AI draft

    Immanuel Kant › 1724–1804

Influenced 5

  • William James

    influenced

    In ‘Philosophical Conceptions and Practical Results’ (1898) James credited Peirce’s ‘How to Make Our Ideas Clear’ (1878) with the principle of pragmatism and made it widely known. W. James, “Philosophical Conceptions and Practical Results” (1898); C. S. Peirce, “How to Make Our Ideas Clear” (1878); SEP “Pragmatism”

    Evidence: AI draft

    William James › 1842–1910

  • John Dewey

    influenced

    Dewey heard Peirce at Johns Hopkins and built Logic: The Theory of Inquiry (1938) on Peirce’s account of inquiry as the passage from doubt to settled belief. J. Dewey, Logic: The Theory of Inquiry (1938); C. S. Peirce, “The Fixation of Belief” (1877); SEP “John Dewey”

    Evidence: AI draft

    John Dewey › 1859–1952

  • Wilfrid Sellars

    influenced

    Sellars took over Peirce’s idea of truth as the ideal end of inquiry, calling the final conceptual framework of science ‘Peirceish’ (Science and Metaphysics, 1968). W. Sellars, Science and Metaphysics: Variations on Kantian Themes (1968); SEP “Wilfrid Sellars”; SEP “Charles Sanders Peirce”

    Evidence: also in InPhO · InPhO

    Wilfrid Sellars › 1912–1989

  • Jürgen Habermas

    influenced

    In Knowledge and Human Interests (1968) Habermas read Peirce’s logic of inquiry as uncovering the technical interest that guides the empirical sciences. J. Habermas, Erkenntnis und Interesse (1968); SEP “Jürgen Habermas”

    Evidence: AI draft

    Jürgen Habermas › 1929–2026

  • Umberto Eco

    influenced ✓

    Eco took Peirce’s interpretant and unlimited semiosis, every sign interpreted by further signs, as the basis of his general semiotics (Trattato di semiotica generale, 1975). U. Eco, Trattato di semiotica generale (1975); Lector in fabula (1979); SEP “Charles Sanders Peirce”

    Evidence: also in Wikidata · Wikidata

    Umberto Eco › 1932–2016

Criticism

Criticizes 1

  • René Descartes

    criticised

    Peirce rejected Cartesian doubt – ‘let us not pretend to doubt in philosophy what we do not doubt in our hearts’ (‘Some Consequences of Four Incapacities’, 1868). C. S. Peirce, “Some Consequences of Four Incapacities”, Journal of Speculative Philosophy 2 (1868); SEP “Charles Sanders Peirce”

    Evidence: AI draft

    René Descartes › 1596–1650

Works

Position

Peirce is the founder of pragmatism, though he later renamed his version “pragmaticism” to distinguish it from James’. His pragmatic maxim says that the meaning of a concept lies in the practical effects we conceive its object to have. Inquiry begins not with Cartesian doubt but with real doubt, and aims to fix belief; truth is what a community of inquirers would ultimately agree on. All knowledge is fallible. Beyond induction and deduction he identified abduction, the inventive inference to the best hypothesis. He also founded modern semiotics, with his theory of signs as icon, index and symbol, and in logic devised a notation for quantifiers independently of Frege.

Life & context

The son of a Harvard mathematician, Peirce worked for three decades as a scientist for the US Coast Survey and taught logic only briefly at Johns Hopkins University. With William James and others he belonged to the “Metaphysical Club” in Cambridge. Difficult and unconventional, he never held a permanent professorship and died in poverty in Milford, Pennsylvania, leaving thousands of manuscript pages.

Further main works

  • The Fixation of Belief (1877)
  • What Pragmatism Is (1905)

Sources: Wikipedia · Wikidata

As of November 2026 · Sources · Improve this page · How Agora is made

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