Abstract

In this article I investigate what the Stoic doctrine of the two principles, God and matter, owes to Plato. I discuss recent scholarly views to the effect that the Stoics were influenced by Old Academic interpretations of the Timaeus and argue that, although the Timaeus probably did play a role in the genesis of the Stoic doctrine, some role was also played by a dualist theory of flux set forth in the etymologies of the Cratylus. I also discuss Theophrastus’ account of Plato’s achievements in physics (fr. 230 FHS&G) and the report of Old Academic physics contained in Cicero’s Academica, 1. 24–9, and commonly taken to go back to Antiochus of Ascalon, and I show that those reports too are likely to have been influenced by the Cratylus.