20th century American drama saw the rise of realism through various movements like the Little Theatre Movement and independent theatre. Eugene O'Neill was a pioneering realist playwright through works like Long Day's Journey Into Night. Other notable American dramatists include Arthur Miller, Tennessee Williams, Edward Albee, Neil Simon, August Wilson, and Lorraine Hansberry, many of whom explored social and political themes through their works. The time period also saw the growth of musical theatre and the flourishing of African American and gay theatre.