The literary movement characterized by disillusionment and a rejection of traditional values after World War I is called the "Lost Generation." The term was coined by Gertrude Stein and popularized by Ernest Hemingway in his novel "The Sun Also Rises." The writers of the Lost Generation, including Hemingway, F. Scott Fitzgerald, and T.S. Eliot, often depicted the disillusionment and despair of the post-war generation.