280 BC[1]) was an Athenian orator originally from Phalerum, a student of Theophrastus, and perhaps of Aristotle, himself, and one of the first Peripatetics. Demetrius was a distinguished statesman who was appointed by the Macedonian king, Cassander, to govern Athens, where he ruled as sole ruler for ten years, introducing important reforms of the legal system while maintaining pro-Cassander oligarchic rule. He was exiled by his enemies in 307 BC, and he went first to Thebes, and then, after 297 BC, to the court of Alexandria.