The roaring 1920s was an era of dramatic change. Among the most enduring manifestations of this change was the rise of the big city. The centrality of urban growth to the social, political, and economic changes of the 1920s gives it a special place in the study of that decade, the twentieth century, and the United States in the modern century. The changes that took place in New York City, America’s largest city by this time (see the interactive activity in the March 2007 issue of History Now), were...