rare. [f. Gr. ἀγαθ-ός good + -ISM; cf. optimism.] The doctrine that all things tend towards ultimate good, as distinguished from optimism which holds that all things are now for the best.
1830. Edin. Rev., L. 309. Wilful evil, to the degree implied in the distinction proposed between Agathism and Optimism, is inconsistent with our apprehension of his [i.e., God’s] nature.
