The Founders wrote in 1776 that "life, liberty, and the pursuit of happiness" are unalienable American rights. In The Pursuit of Happiness in Times of War, Carl M. Cannon shows how this single phrase is one of almost unbelievable historical power. It was this rich rhetorical vein that New York Mayor Rudolph Giuliani and President George W. Bush tapped into after 9/11 when they urged Americans to go to ballgames, to shop, to do things that...