In the late nineteenth and early twentieth centuries, technological innovation made possible dramatic increases in industrial and agricultural productivity; by 1919, per-capita gross national product had soared. But this new wealth and new power were not distributed evenly. In this landmark work--with continued resonance for our times--acclaimed historian Nell Irvin Painter illuminates the class, economic, and political conflicts that defined the Progressive era. Demonstrating the ways in which racial and social hierarchies were interwoven with reform movements, she offers a lively and comprehensive view of Americans, rich and working-class, at the precipice of change.