The Progressive Era (1896–1917) was a period in the United States during the early 20th century of widespread social activism and political reform across the country. Progressives sought to address the problems caused by rapid industrialization, urbanization, immigration, and political corruption as well as the enormous concentration of industrial ownership in monopolies. Progressive reformers were alarmed by the spread of slums, poverty, and the exploitation of labor. Multiple overlapping progressive movements fought perceived social, political, and economic ills by advancing democracy, scientific methods, and professionalism; regulating business; protecting the natural environment; and improving working and living conditions of the urban poor.

The Prohibition era was the period from 1920 to 1933 when the United States prohibited the production, importation, transportation and sale of alcoholic beverages. The alcohol industry was curtailed by a succession of state legislatures, and finally ended nationwide under the Eighteenth Amendment to the United States Constitution, ratified on January 16, 1919. Prohibition ended with the ratification of the Twenty-first Amendment, which repealed the Eighteenth Amendment on December 5, 1933.