We live in a self-proclaimed Urban Age, where we celebrate the city as the source of economic prosperity, a nurturer of social and cultural diversity, and a place primed for democracy. We proclaim the city as the fertile ground from which progress will arise. Without cities, we tell ourselves, human civilization would falter and decay. In Cities in the Urban Age, Robert A. Beauregard argues that this line of thinking is not only hyperbolic--it is too celebratory by half.

For Beauregard, the city is a cauldron for four haunting contradictions. First, cities are equally defined by...