Philosopher	Approx. dates bCe
	Thales	624 - 545
	Anaximenes	545 (flourished)
	Anaxagoras	500 - 428
	Xenophanes	5?? - 4??
	Heracleitus	540 - 480
	Empedocles	490 - 430
	Democritus	460 - 370
	Heracleides	390 - 322
	Socrates	470 - 399
	Plato	427 - 347
	Aristotle	384 - 322
Stanford Encyclopedia of Philosophy