In its first seven years, the North American Free Trade Agreement (NAFTA) tripled trade among the U.S., Mexico, and Canada, and the region's share of the world economy grew from 30 to 36 percent. In 2001, however, North America peaked. Trade slowed among the three, manufacturing jobs shrunk, and illegal migration and drug-related violence soared. Europe caught up, and China leaped ahead. In The North American Idea, eminent scholar and policy-maker...