One of the world's foremost commentators on religious affairs on the history (and destiny) of the world's most misunderstood religion. In the public mind, Islam is a religion of extremes: it is the world's fastest growing faith; more than three-quarters of the world's refugees are Islamic; it has produced government by authoritarian monarchies in Saudi Arabia and ultra-republicans in Iran. Whether we are reading about civil war in Algeria or Afghanistan, the struggle for the soul of Turkey,...