In his philosophy he proposed cycles of Love and Strife that would join and separate the natural makeup of the world.  
His early theory of evolution led to Galen labeling him the founder of Italian medicine. A native of Acragas, he had been expelled from the Pythagorean order for "stealing discourses."  Of his original written works the poem Katharmoi is one of only two extant.  In his philosophy he proposed cycles of Love and Strife that would join and separate the natural makeup of the world.  FTP, name this Greek philosopher, who might have thrown himself into Mt. Etna and believed that matter was made up of fire, water, earth, and air.
His early theory of evolution led to Galen labeling him the founder of Italian medicine.
Empedocles