Before 9/11, few Westerners had heard of Wahhabism. Today, it is a household word. Frequently mentioned in association with Osama bin Laden, Wahhabism is portrayed by the media and public officials as an intolerant, puritanical, militant interpretation of Islam that calls for the wholesale destruction of the West in a jihad of global proportions. In the first study ever undertaken of the writings of Wahhabism's founder, Muhammad Ibn Abd al-Wahhab...