"Had the Greeks, says the Abbe Milot, been as wise as they were courageous, they would have been admonished by experience of the necessity of a closer union, and would have availed themselves of the peace which followed their success against the Persian arms, to establish such a reformation. Instead of this obvious policy, Athens and Sparta, inflated with the victories and the glory they had acquired, became first rivals and then enemies; and did each other infinitely more mischief than they had suffered from Xerxes. Their mutual jealousies, fears, hatreds, and injuries ended in the celebrated Peloponnesian war; which itself ended in the ruin and slavery of the Athenians who had begun it."
- Alexander Hamilton and James Madison, in the Federalist Papers (Federalist No. 18)
So I once read a book history of Ancient Greece, and I've even been learning the Ancient Greek language since 2013 (as some of you already know). I'm almost done reading my intro textbook on the subject, actually, and so I've spent many hours studying this topic over these past few years. (Update, 2017: I actually finished the intro textbook recently.) Nonetheless, I actually learned a lot from this three-hour TV program on this topic; since it is well-researched, well-presented, and it interviews the experts. I've gotten pretty deep into their culture already through these language exploits, but I nonetheless learned much from this documentary, and not just because it shows pictures of the actual places and artifacts from the time. (Although it does do plenty of that, and supplements my reading with the visuals.)
Temple of Olympian Zeus in Athens
So how did I learn something from this, you might be asking? What was it that was so new to me that my textbooks hadn't shown me this information before? Why was it that I learned something from a medium that is usually brief, and occasionally superficial?
Greek statesman Cleisthenes