Answer: 429 - 347 B.C.- MOST FAMOUS PUPIL OF SOCRATES WHO CONTINUED TO INVESTIGATE MORAL CONDUCT.- WAS AN OPPONENT OF DEMOCRACY LIKE OTHER ATHENIAN INTELLECTUALS.- GREATLY RESENTED EXECUTION OF SOCRATES AT THE HANDS OF A POPULAR COURT.- BELIEVED THERE WAS HIGHER ORDER BEHIND EXTERNAL EVENTS AND THUS THE GOAL OF PHILOSOPHY WAS TO PENETRATE THROUGH THE REALM OF EVERYDAY APPEARANCES TO THE REAL NATURE OF THINGS.- HIS MOST FAMOUS WORK IS THE REPUBLIC IN WHICH HE DEVELOPED THE IDEAL STATE. THE POLEIS SHOULD BE DIVIDED INTO 3 CLASSES:1) PHILOSOPHERS - THESE SHOULD BE THE RULERS OF THE STATE. THESE PEOPLE POSSESSED REASON. "THE STATE WILL BE RULED WELL WHEN KINGS BECOME PHILOSOPHERS AND PHILOSOPHERS BECOME KINGS."2) WARRIORS - DEFENDERS OF THE STATE WHO POSSESSED SPIRIT.3) WORKERS - PRODUCE THE NEEDED MATERIAL TO SUSTAIN THE STATE.