Protagoras
Encyclopedia article; The Columbia Encyclopedia, Sixth Edition, 2007
PROTAGORAS protag r s, c.490 c.421 b.c., Greek philosopher of Abdera, one of the more distinguished Sophists . He taught for...Athens, where he was a friend of Pericles and knew Socrates, but was forced to flee because of his professed agnosticism. Protagoras was the author of the famous saying, "Man is the measure of all things." He held that each man is the standard of what...