Part three of a 15-part series of documentaries produced by the American Broadcasting Company on the 20th century and the rise of the United States as a superpower.

The 1920s ushered in an era of great social change, general prosperity, Prohibition and what historians refer to as "modernity." This episode examines these great cultural changes and their affects on the nation. The 1920s, in stark contrast to the Victorian era, "roared," as bathtub gin flowed and more and more Americans moved to urban areas. But the decade also saw limited prosperity for many, especially farmers, and the unrest and discord between the values of small town America and the rapid pace of science and technology. The optimism of the decade would end in the most severe economic depression in American history. Episode 3 presents some of the major events that shaped the decade including The Scopes Monkey Trial, Prohibition, the rise of leisure pastimes, and the impact of inventions such as the automobile, radio, movies and electricity.