Industrial capitalism unleashed powerful forces in American life. Along with wealth, technological innovation, and rising standards of living, a host of social problems unsettled many who turned to reform politics to set the world right again. The Progressive Era signaled that a turning point had been reached for many Americans who were suddenly willing to confront the age’s problems with national political solutions. Reformers sought to bring order to chaos, to bring efficiency to inefficiency, and to bring justice to injustice. Causes varied, constituencies shifted, and the tangible effects of so much energy was difficult to measure, but the Progressive Era signaled a bursting of long-simmering tensions and introduced new patterns in the relationship between American society, American culture, and American politics.

This chapter was edited by Mary Anne Henderson, with content contributions by Andrew C. Baker, Peter Catapano, Blaine Hamilton, Mary Anne Henderson, Amanda Hughett, Amy Kohout, Maria Montalvo, Brent Ruswick, Philip Luke Sinitiere, Nora Slonimsky, Whitney Stewart, and Brandy Thomas Wells.