Aristippus (434-356 BC)
Although a student of Socrates in Athens, Aristippus was born in Cyrene, so his philosophy is called Cyrenaicism. The basic doctrine was pleasure is all that matters. For Aristippus and his followers, the pursuit of happiness required the immediate gratification of any and every desire. People should control their circumstances, and not allow circumstances to control them. This Cyrenaic approach allowed no thought of the consequences because knowledge is unreliable, amoral and only exists in the sensations of the moment. Although Aristippus may have argued for restraint, for many Cyrenaicism was an excuse for sexual promiscuity and physical brutality.