In June 2007 civil war broke out in the Gaza Strip between two rival Palestinian factions, Hamas and Fatah. Western peace efforts in the region always focused on reconciling two opposing fronts: Israel and Palestine. Now, this careful exploration of Middle East history over the last two decades reveals that the Palestinians have long been a house divided. What began as a political rivalry between Fatah's Yasir Arafat and Hamas leader Sheikh Ahmed Yassin during the first intifada of 1987 evolved into a full-blown battle on the streets of Gaza between the forces of Arafat's successor,...