Empedocles was a Greek pre-Socratic philosopher and a citizen of Acragas (Agrigentum), a Greek city in Sicily. Empedocles' philosophy is best known for originating the cosmogenic theory of the four classical elements. He also proposed forces he called Love and Strife which would mix as well as separate the elements. These physical speculations were part of a history of the universe which also dealt with the origin and development of life. Influenced by the Pythagoreans, Empedocles was a vegetarian who supported the doctrine of reincarnation. He is generally considered the last Greek philosopher to have recorded his ideas in verse. Some of his work survives, more than is the case for any other pre-Socratic philosopher. Empedocles' death was mythologized by ancient writers, and has been the subject of a number of literary treatments.