Book excerpt: Across the Muslim world, religion plays an increasingly prominent role in both the private and public lives of over a billion people. Will democratic political participation by an increasingly religious population lead to victories by Islamists at the ballot box? Will more conspicuously pious Muslims participate in politics and markets in a fundamentally different way than they had previously? Against the common assumption that piety would naturally inhibit any tendencies towards modernity, democracy, or cosmopolitanism, Piety and Public Opinion reveals the complex and subtle links between religion and political beliefs in a critically important Muslim democracy.