Linda Zagzebski

The title of Hare’s book refers to the gap between the demand that morality places on us and our natural capacity to live by it. Such a gap is paradoxical if we accept the “‘ought’ implies ‘can”’ principle. The solution, Hare argues, is that the gap is filled by the Christian God. So we ought to be moral and can do so—with divine assistance. Hare’s statement and defense of the existence of the gap combines a rigorously Kantian notion of the moral demand with a rigorously Calvinist notion of human depravity. As such, many readers will find the gap exaggerated, but most people will admit that there is some sort of gap here to be faced, and any gap at all is a problem.

In this paper I present an argument that there can be no more than one God in a way which allows me to give the doctrine ofthe Trinity logical priority over the attributes traditionally used in arguments for God’s unicity. The argument that there is at most one God makes no assumptions about the particular attributes included in divinity. It uses only the Identity of Indiscemibles and a Principle of Plenitude. I then offer a theory on the relationship between individuals and kinds which allows me to offer an interpretation of the Trinity.