tychism


tychism

(ˈtaɪkɪzəm) n (Philosophy) philosophy the theory that chance is an objective reality at work in the universe, esp in evolutionary adaptations[from Greek tukhē chance]

tychism

1. the theory that chance is involved in evolution and that variation within a species is accidental.
2. the belief that chance rather than mere determinism operates in the cosmos. Cf. uniformitarianism.See also: Evolution