Abstract
The moral argument for the existence of God is really a family of arguments. What they have in common is Kant’s insistence that philosophical theology proceed by drawing out the presuppositions of moral reasoning. Kant’s own favorite version of the argument is widely rejected today. Kant maintained that the summum bonum, the perfect unison of virtue and happiness, is the aim of rational action. Because it ought to be achieved it is possible, as the ought implies the ability to bring it about. The moral faith is that God’s existence and human immortality enable continued moral progress after death and the enjoying of happiness appropriate to it, thus making the arrival at the summum bonum possible. Kant also urged that the categorical commands of the moral conscience suggested the existence of a cosmic lawgiver and commander, and there are a number of nineteenth-century arguments which proceed along those lines.