Art of RhetoricAristotle (384322 BC), the great Greek thinker, researcher, and educator, ranks among the most important and influential figures in the history of philosophy, theology, and science. He joined Plato's Academy in Athens in 367 and remained there for twenty years. After spending three years at the Asian court of a former pupil, Hermeias, he was appointed by Philip of Macedon in 343 2 to become tutor of his teenaged son, Alexander. After Philip's death in