Well, now Plato's most famous student is Aristotle. And like his teacher, Aristotle is famous for many things and explored many dimensions of the universe. But he is probably most famous for being the tutor of Alexander the Great when Alexander the Great was young. Philip of Macedon, Alexander the Great's father, as he conquers the weakened city-states after the Peloponnesian War, he also conquers Aristotle's hometown of Stagira and he enslaves the population. And so when he goes to Aristotle to tutor his young son, who ends up being called Alexander the Great eventually, Aristotle says, okay, my fee will be free the people of my town. His town is freed. He tutors a young Alexander when Alexander's in his early teens.