A philosopher of Agrigentum, in Sicily; "extolled in antiquity as a statesman and orator, as physicist, physician, and poet, and even as prophet and worker of miracles," who flourished about the year 440 B.C.; he conceived the universe as made up of "four eternal, self-subsistent, mutually underivative, but divisible, primal material bodies, mingled and moulded by two moving forces, the uniting one of friendship and the disuniting one of strife"; of him it is fabled that, to persuade his fellow-citizens, with whom he had been in high favour as their deliverer from the tyranny of the aristocracy, of his bodily translation from earth to heaven, he threw himself unseen into the crater of Etna, but that at the next eruption of the mountain his slipper was cast up and revealed the fraud.