The document summarizes key events and trends during the 1920s in the United States. The decade saw a return to "normalcy" through isolationism, nativism, and political conservatism under President Harding. However, scandals damaged his administration. The period was also marked by labor unrest, the rise of the Ku Klux Klan, Prohibition, the Scopes Trial, the Harlem Renaissance, and mass media and consumer culture. Ultimately, an economic boom fueled by speculation and easy credit ended with the 1929 stock market crash, plunging the nation into the Great Depression.