Beginning his study of philosophy under Plato at the age of eighteen, Aristotle would become one of philosophy's greatest polymaths. He delved into every area — including but not limited to metaphysics, logic, aesthetics, ethics, and political thought. No wonder, then, that St. Thomas Aquinas would later refer to him simply as “The Philosopher.” More than two millennia after his death his work is widely read by students of ethics, politics, rhetoric, and theater and every conceivable branch of philosophy. Aristotle is one of the greatest philosophers that ever lived.