Structuralism holds that the elements of a system have no meaning in isolation. What a thing means is a function of its position in a network of differences.

The linguistic origin

Ferdinand de Saussure's lectures, published in 1916 after his death, made the founding moves. A sign joins a signifier — the sound or mark — to a signified, the concept, and the link between them is arbitrary: nothing about the sound of "tree" resembles a tree.

If the connection is arbitrary, what fixes meaning? Saussure's answer is difference. "Bat" means what it does because it is not "cat", "bad" or "bet". Language is a system of distinctions, and the value of a term is its position in that system rather than anything it contains.

He also separated langue, the system, from parole, particular utterances, and argued the system is what a science of language should study.

The extension

Claude Lévi-Strauss applied the method to kinship and myth in the 1940s and 50s. A myth's meaning is not in its story but in the oppositions structuring it — raw and cooked, nature and culture — and variants across societies are transformations of one underlying structure.

Roland Barthes read fashion, advertising and food the same way, treating culture as a system of signs whose apparent naturalness conceals an arrangement. Jacques Lacan re-read Freud on the claim that the unconscious is structured like a language.

The common commitments

Systems over elements. Synchronic analysis — the structure as it stands — over historical development. And a suspicion of the subject: if structures generate meaning, the individual speaker is less an author than a position the system provides.

What came after

That last commitment is where it broke. Critics objected that structuralism could not account for change, or for agency, and its claim to scientific rigor concealed choices the analyst was making.

Derrida's 1966 lecture on structure turned the method's own tools against it, arguing that no system can be closed or centered as structuralism required. See post-structuralism, and Foucault, who was grouped with the movement and rejected the label.