Pollster Mark Penn argues that the biggest trends in America are microtrends, the smaller trends that go unnoticed or ignored. One million people can create new market for a business, spark a social movement, or effect political change. In 1996, a microtrend identified by Penn ("soccer moms") helped re-elect Clinton. Now, Penn identifies the new microtrends sweeping the world, from Extreme Commuters and Working Retired to Old New Dads, from Bourgeois...