Book excerpt: In The Clash of Civilizations, Samuel Huntington argued that the borders between Western and Islamic civilizations would one day become the loci of cultural conflict. The statements of Osama Bin-Laden would seem to support this view. "This battle is not between al-Qaeda and the U.S.," he famously said in October of 2001. "This is a battle of Muslims against the Global Crusaders." These specially commissioned essays critically examine the virtual and actual borders of Islamic civilization. Contributors concentrate on local dynamics and whether they support or contradict an emerging global confrontation between Islam and its Christian, Hindu, Buddhist, and secular neighbors. They consider borders that host Muslim majorities (Afghanistan, Bosnia, Chechnya, Ethiopia, Indonesia, Somalia, Pakistan, and Turkey), those that have significant Muslim minorities (Phillipines, Nigeria, and India), and those that reflect new faultlines created by migration to France, the United Kingdom, the United States, and Spain or by advances in technology. Essays explore the rise of international Salafi jihadism and whether it can be traced to countries that straddle the Islamic and non-Islamic world. In conclusion, the contributors argue that mechanisms far more complex than those described in Huntington's Clash of Civilizations influence many border regions, suggesting that, while poverty and institutional failure heighten religious awareness and practice, the actual effects of these phenomena are entirely different.