Aristotle (384-322 BCE), a Greek philosopher and student of Plato, profoundly shaped Western thought. Tutored Alexander the Great, he founded the Lyceum, where he explored diverse subjects. His works, including "Nicomachean Ethics" and "Politics," influenced ethics, politics, and metaphysics. Aristotle's scientific contributions ranged from biology to physics, though some ideas were later revised. His enduring impact on philosophy and science makes him a pivotal figure in ancient Greek intellectual history.