For the Journal of the American Revolution, Todd Andrlik compiled a list of the ages of the key participants in the Revolutionary War as of July 4, 1776. Many of them were surprisingly young: Marquis de Lafayette, 18 James Monroe, 18 Gilbert Stuart, 20 Aaron Burr, 20 Alexander Hamilton, 21 Betsy Ross, 24 James Madison, 25 This is kind of blowing my mind...because of the compression of history, I'd always assumed all these people were around the same age. But in thinking about it, all startups need young people...Hamilton, Lafayette, and Burr were perhaps the Gates, Jobs, and Zuckerberg of...