Charles Sanders Peirce (1839–1914) was an American philosopher, logician, and scientist. He is the founder of pragmatism and of modern semiotics as a formal discipline.
Core ideas
- Triadic sign theory: a sign is a three-place relation among a representamen (sign vehicle), an object, and an interpretant. This triadic structure distinguishes Peirce’s semiotics from Saussure’s dyadic model.
- Pragmatism: the meaning of a concept is the sum of its practical consequences. Peirce later renamed his position “pragmaticism” to distinguish it from William James’s popularization.
- Abduction: a third mode of inference alongside deduction and induction — the generation of explanatory hypotheses. Peirce considered abduction the engine of scientific discovery.
- Categories: Firstness (quality, possibility), Secondness (reaction, brute fact), Thirdness (mediation, law, habit). These categories structure Peirce’s classifications of signs.
- Unlimited semiosis: interpretants are themselves signs, producing further interpretants in an open-ended chain of meaning.
Notable works
- Collected Papers of Charles Sanders Peirce (8 volumes, published posthumously)
- “On a New List of Categories” (1867)
- “How to Make Our Ideas Clear” (1878)
- “A Guess at the Riddle” (c. 1890)
Related
- sign — the central concept of his semiotic theory
- interpretant — the meaning produced by a sign
- semiosis — the process of sign-mediated meaning-making