Toynbee, Arnold J. "The Forfeited Birthright of the Abortive Far Eastern Christian Civilization"
Divergence: 731 CE
What if: The Umayyads did not press on after their defeat at the Kish-Samarkand pass.
Comments: How Nestorian Christianity could have spread into Asia, later leading to Muslim destruction at the hands of Christianized Seljuks and Mongols.
Published: In A Study of History, Volume II, Oxford University 1934 (0192152084BUY).