George Santayana famously said, "Those who do not remember the past are condemned to repeat it." Sadly, many today know very little about history, and how so many of our institutions - including the US constitution - are based on historical lessons and realities.
Courtesy of The Burning Platform, I came across this 20-minute video summarizing the history of Ancient Rome. It's very informative, even though it skips most of the important details in favor of a high-speed pass through an empire that lasted for over one and a half millennia. In particular, note the parallels between Roman history and our own. They're striking.
I hope the producers of that video go on to make more along the same lines, summarizing other great civilizations of history. We're starved of good modern material about them, particularly in "bite-size" chunks that can be easily digested by a post-literate society that gets most of its information from TV.