Aristotle
Aristotle (384–322 BC) was a Greek philosopher, a student of Plato, and a tutor to Alexander the Great. His writings, on such diverse subjects as rhetoric, logic, politics, ethics, biology, physics, and poetry, comprise some of the foundations of Western philosophy. He wrote as many as 200 treatises during his lifetime, of which only 31 survive. Of these, Aristotle's best-known works include Metaphysics, Nicomachean Ethics, Eudemian Ethics, Politics, and On the Soul.