American literature from 1860 to the present is marked by diverse movements that reflect societal changes. Realism and naturalism emerged post-Civil War, focusing on accurate depictions of life and determinism. Modernism and the Harlem Renaissance followed, experimenting with form and celebrating African American culture. Post-World War II saw the rise of postmodernism, the Beat Generation, and confessional poetry. These movements challenged norms, explored personal experiences, and pushed literary boundaries. Each movement left a lasting impact on American literature and culture.