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624 BCE
Thales of Miletus
He was the founder of the Milesian School of natural philosophy, and the teacher of Anaximander. He was one of the first Western philosophers who attempted to find naturalistic explanations of the world (Naturalism or Materialism) without reference to supernatural or mythological explanations, such as the Greek anthropomorphic gods and heroes. -
570 BCE
Pythagoras
He was the founder of the influential philosophical and religious movement or cult called Pythagoreanism, and he was probably the first man to actually call himself a philosopher (or lover of wisdom). Pythagoras (or in a broader sense the Pythagoreans), allegedly exercised an important influence on the work of Plato. -
428 BCE
Plato
Thales of Miletus -
384 BCE
Aristotle
He is a towering figure in ancient Greek philosophy, making contributions to logic, metaphysics, mathematics, physics, biology, botany, ethics, politics, agriculture, medicine, dance and theatre. He was a student of Plato who in turn studied under Socrates. Aristotle's philosophy stresses biology, instead of mathematics like Plato. He also defined the supreme good as an activity of the rational soul in accordance with virtue.