“The Caliph and the Imam: The Making of Sunnism and Shiism” by Toby Matthiesen
Western scholars have tried, since the 18th century, to explain the differences between Sunni and Shia traditions of Islam; Muslim scholars have tried since the death of the Prophet Muhammad. Epistemological problems beset these efforts. How to describe beliefs, held by individuals across 5,000 miles and 1,400 years?

