American Realism in theatre emerged post-World War II, depicting ordinary people's struggles and social issues. Playwrights like Arthur Miller and Tennessee Williams explored themes of disillusionment, family dynamics, and the American Dream through complex characters and natural dialogue. These works often critiqued society, exposing flaws and inequalities. Set in familiar domestic spaces, the plays used minimalist staging and focused on dialogue to create a sense of authenticity. Their influence on American theatre and culture continues to resonate today.