After World War II, leading western powers focused their attention on fighting the "Red Menace," Communism. Today, as terrorist activity is increasingly linked to militant Islamism, some politicians and scholars fear a "Green Menace," a Pan-Islamic totalitarian movement fueled by monolithic religious ideology. Such fears have no foundation in history, according to Vartan Gregorian. In this succinct, powerful survey of Islam, Gregorian focuses on Muslim diversity and division, portraying the faith and its people as a mosaic, not a monolith. The book begins with an accessible overview of Isla