American drama and theater from 1860 to the present evolved alongside major historical events, reflecting societal changes and cultural shifts. Playwrights like Eugene O'Neill, Tennessee Williams, and Arthur Miller explored themes of the American Dream, family dynamics, and social issues through innovative dramatic techniques. Key works such as "Death of a Salesman" and "A Raisin in the Sun" tackled complex themes like disillusionment and racial discrimination. The rise of realism, expressionism, and absurdism in theater challenged traditional forms, while technological advancements transformed theatrical production and performance.