And remember, we're now after the period of the Peloponnesian War. The city-states of Greece, especially Athens, have been dramatically weakened. So a lot of people might be thinking, including Plato, well, is there a better way to govern ourselves? 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.