This document summarizes social and political developments in the United States during the 1920s. It discusses the growth of nativism and restrictions on immigration. It also covers several prominent legal cases like the Sacco and Vanzetti trial and the Scopes Monkey Trial. Other topics covered include the rise of the Ku Klux Klan, Prohibition, women's suffrage, the Harlem Renaissance, and the development of mass culture during the decade.