The document summarizes developments in science, art, and culture in the postwar era following World War I. Sigmund Freud's work in psychology helped explain irrational events while Albert Einstein's theories challenged traditional ideas. In art, surrealism combined conscious and unconscious elements and stream of consciousness broke from traditional novels. Architecture moved toward functionalism where form followed use. Popular culture saw new technologies like movies and consumer goods became more affordable as incomes rose in the 1920s.