Ayaan Hirsi Ali is concerned with how the West is dismantling its traditional cultural norms and with what it intends to replace them. Others have said similar things before. Philip Rieff and Sir Roger Scruton are two that come to mind. But the impression both of them leave is that, yes, they think God is a very good idea for grounding a civilized culture, but they are not entirely sure that he exists. What Ali has done is taken the obvious—and indeed necessary—next step: She sees the necessity of a sacred order and is not afraid to say so. It...