Xenocrates

Xenocrates, an ancient philosopher, was born at Chalcedon 396 B.C., and governed the Academy as successor to Spensippus, himself the successor of Plato, from 339 till his death in 314. He wrote numerous treatises upon dialectics, physics, and ethics, of which the titles only have been preserved; and what is known of his doctrines is gathered only from notices in various authors. He introduced into the Academy the mystic Pythagorean doctrine of numbers in connection with the ideas of Plato.