Most western philosophical traditions began in Ancient Greece in the 6th century BC. The first philosophers are called “Presocratics,” which designates that they came before Socrates, whose contributions mark a turning point in western thought. The Presocratics were from the western or the eastern colonies of Greece and only fragments of their original writings survive, in some cases merely a single sentence.
A new period of philosophy started with Socrates. Like the Sophists, he rejected entirely the physical speculations in which his predecessors had indulged, and made the thoughts and opinions of people his starting-point. Aspects of Socrates were first united from Plato, who also combined with them many of the principles established by earlier philosophers, and developed the whole of this material into the unity of a comprehensive system.
Aristotle of Stagira, the most important disciple of Plato, shared with his teacher the title of the greatest philosopher of antiquity. But while Plato had sought to elucidate and explain things from the supra-sensual standpoint of the forms, his pupil preferred to start from the facts given us by experience. Except from these three most significant Greek philosophers other known schools of Greek philosophy from other founders during ancient times were Stoicism, Epicureanism, Skepticism and Neoplatonism.