As of this decade, more than half the earth's population lives in cities; our world is not just globalized, but urbanized. This powerful reappraisal draws on two decades of fieldwork and research to show how the metropolis has become a medium for revolutionary social change. Not just political upheaval but technological, economic, and cultural innovations are forged in our urban centers. From Chicago to Mumbai, in every corner of the world, the city is now a laboratory for revolution, brewing potential solutions to poverty, inequality, and sustainability. Bridging urban studies, economics, and sociology, Jeb Brugmann's Welcome to the Urban Revolution turns traditional urbanism on its head, and offers an inspiring new way of understanding our cities.