Hellenistic is a term which refers to Greek, and later, Graeco-Roman civilization in the period beginning with the death of Alexander the Great (323 B.C.) and ending, by convention, with the victory of Octavian over Mark Antony at the battle of Actium in 3i B.C. During these three centuries it is neither Platonism nor the Peripatetic tradition established by Aristotle which occupied the central place in ancient philosophy, but Stoicism, Scepticism and Epicureanism, all of which were post-Aristotelian developments.