Chance has a complex philosophical history. Aristotle distinguished between
chance (tyche) in human affairs and coincidence (automaton) in nature. Epicurus introduced the clinamen — the spontaneous swerve of atoms — as a source of genuine indeterminacy in
the Epicurean cosmos and the basis of free will. In the philosophy of science, the debate between determinism and indeterminism has been transformed by quantum mechanics, which appears to build genuine probabilistic chance into the structure of reality. Peirce's tychism holds that chance is a real and irreducible feature of
the universe. For poetry, chance matters aesthetically (aleatory
composition, automatic writing) and philosophically (the contingency of
existence,
the place of the unexpected in a life or
a poem). Mallarmé's engagement with chance — the throw of the dice — is the paradigmatic poetic engagement with this philosophical concept. Related terms: contingency, determinism, indeterminism, Epicurean clinamen, tychism, aleatory aesthetics.