In the Mosaic of Islam Perry Anderson and the acclaimed historian of Islam Suleiman Mourad aim to introduce the long history of Islam and its reception, from Muhammad to the present, in an open and accessible manner. In this extract from the book, Anderson and Mourad discuss the antagonism between Shiʿis and Sunnis, the causes and effects of the Arab Spring, Israel's place in the Middle East, and the history of Pan-Arabism.