Book excerpt: A visionary social thinker reveals how the addition of one hundred million Americans by midcentury will transform the way we live, work, and prosper. In stark contrast to the rest of the world's advanced nations, the United States is growing at a record rate, and, according to census projections, will be home to four hundred million Americans by 2050. Drawing on prodigious research, firsthand reportage, and historical analysis, acclaimed forecaster Joel Kotkin reveals how this unprecedented growth will take shape-and why it is the greatest indicator of the nation's long-term economic strength. At a time of great pessimism about America's future, The Next Hundred Million shows why the United States will emerge a stronger and more diverse nation by midcentury.