But once again, this is in this period. That's in this period right over here. This is also the period that we associate with the famous Greek philosophers. These lines right over here are the lives of Socrates and Plato, who was Socrates' student, established the famous academy. Aristotle, who was Plato's student and famous tutor of Alexander the Great. Now as I mentioned, you had these city states. And the ones that are worth mentioning, or all of them are worth mentioning, but I have in this diagram the most significant city states of ancient Greece that you'll hear a lot about.