The '20s and the '50s were periods of post-war prosperity.
Both decades produced new genres of music, the roaring-twenties popularized jazz, and the '50s had rock music.
Additionally, both decades had a widespread fear of communism, this era was specifically called the "Red Scare." In the '20s, the Attorney General conducted the Palmer Raids, and in the '50s, Senator McCarthy produced a series of investigations that were meant to expose 'secret communists' in the United States.
