The German silent film The Cabinet of Dr. Caligari (1919) is one of the classic examples of expressionistic technique in film. Odd angles of vision, distorted sets, and hypnotic acting enhance the dream-like portrayal of insanity in this film.

The Hairy Ape;;;; (1922) is O'Neill's most completely expressionistic play. Set initially on an ocean liner and focusing on the social snub felt by the brutish, below-deck worker, Yank, the play creates a nightmare atmosphere as Yank searches for a place where he can "belong."

All God's Chillun Got Wings (1924) is another of O'Neill's plays dealing with the black experience. The play caused a tremendous controversy because of the interracial kissing of a hand and the portrayal of an interracial marriage.

In the history of theatre, A Raisin in the Sun (1959) by Lorraine Hansberry is one of the most famous and commercially successful...