1911 Encyclopedia Britannica (1911)
“ ARISTIPPUS (c. 435–356 B.C.) , Greek philosopher, the founder of the Cyrenaic school, was the son of Aritadas, a merchant of Cyrene. At an early age he came to Athens, and was induced to remain by the fame of Socrates, whose pupil he became. Subsequently he travelled through a number of Grecian cities, and finally settled in Cyrene, where he founded his school. His philosophy was eminently practical (see Cyrenaics) . Starting from the two Socratic principles of virtue and happiness, he emphasized the second, and made pleasure the criterion of life. ”
