From the time of Immanuel Kant to the present day, a great many attempts have been made to base arguments for God's existence not upon the mere fact that there is a world, nor on the general orderliness it manifests, but on a very special feature of that world—human moral experience. The popularity of moral arguments is not hard to understand. David Hume and Kant had produced powerful and apparently disabling criticisms of the traditional arguments of natural theology, criticisms that seemed decisive against any conceivable type of argument to God as the explanation of the world. Hume had no alternative theistic argument to offer and, insofar as theoretical reasoning is concerned, Kant had none either. The structure of Kant's ethical philosophy, however, accorded to "practical reason" privileges not shared by theoretical reason. If God...