On President Obama Telling Us to Not "Look Back" (Spoken Like a True Progressive)

No offense to our former President but that's kind of a dumb statement. The fact of the matter is that you can learn a lot of both good (the Enlightenment, the U.S. Constitution, Adam Smith's "The Wealth of Nations", etc.) and bad (the Gulf of Tonkin, WMD, the Treaty of Versailles, etc.) lessons from looking back and you'd think that a Harvard Educated lawyer would know that. Seemingly not, I guess.