A groundbreaking examination of the growing inequality gap from the bestselling author of Bowling Alone: why fewer Americans today have the opportunity for upward mobility.It's the American dream: get a good education, work hard, buy a house, and achieve prosperity and success. This is the America we believe in—a nation of opportunity, constrained only by ability and effort. But during the last twenty-five years we have seen a disturbing "opportunity gap" emerge. Americans have always believed in equality of opportunity, the idea that all kids, regardless of their family background, should have a decent chance to improve their lot in life. Now, this central tenet of the American dream seems no longer true or at the least, much less true than it was. Robert Putnam—about whom The Economist said, "his scholarship is wide-ranging, his intelligence luminous, his tone modest, his prose unpretentious and frequently funny"—offers a personal but...