The document provides an overview of several key people, events, and developments that occurred in the United States during the 1920s. It mentions postwar isolationism, nativism, and fears of communism that led to the Palmer Raids and Sacco and Vanzetti trial. It also discusses social changes like Prohibition, the rise of fundamentalism, Scopes Trial, flappers and new styles for women. Additionally, it outlines technological innovations, the growth of consumerism, and cultural developments like the Harlem Renaissance and works of writers like Fitzgerald and Hemingway that captured the era.