Posidonius of Apamea (135-51): Greek philosopher, historian, and scientist.
As a philosopher, he was not an innovator, but applied the theory to science and scholarship. For example, his Histories were a philosophical continuation of the World History of Polybius of Megalopolis. Among his other publications were treatises in which the Stoic world view was applied to everyday subjects: On anger, On virtue, and Consolation. Being more interested in educating the masses than in theoretical purity, he often borrowed ideas from other schools. Philosophy after Posidonius often was a cross-fertilization between viewpoints (e.g., Plutarch of Chaeronea and Plotinus).