 In expanding the article to a more comprehensive crosscultural treatment, I particularly thank Alnoor Dhanani and Robert Wisnovsky for helpful advice and comments on atomism in Islamic thought; Amber Carpenter, Jonardon Ganeri and Cat Prueitt for invaluable help in writing the sections on Indian atomism; William Newman and Christoph Lüthy for feedback and references on the transmission of Islamic atomism into medieval Europe; and Ted Slingerland for advice on atomism in Chinese philosophy.