Counterfactual history
Eliot, T. S. “Burnt Norton.” Collected Poems 1909–1935. Harcourt, Brace And Company, 1936, pt. 1.
The History of the Decline and Fall of the Roman Empire
On the counterfactual possibility of an Arab victory against the French army at Poitiers in 732 AD.
Gibbon, Edward. The History of the Decline and Fall of the Roman Empire. Vol. 6, London: Strahan & Cadell, 1789, ch. 52.
Gibbon, Edward. The Decline and Fall of the Roman Empire: Volumes 1-6. Vol. 6. Everyman's Library, 2010, ch. 52.
Citizen Kane. Directed by Orson Welles. RKO Radio Pictures/Mercury Productions, 1941.
It's a Wonderful Life. Directed by Frank Capra, Liberty Films, 1946.
Trevelyan, George Macaulay. English Social History: A Survey of Six Centuries Chaucer to Queen Victoria. Longmans, Green and Company, 1942, ch. 8.
Mystic River. Directed by Clint Eastwood, Village Roadshow Pictures/Malpaso Productions/NPV Entertainment, 2003.