  One of the most popular arguments for monotheism is drawn from the world’s unity. If there were several designers who acted independently or at cross-purposes, we would expect to find evidence of this in their handiwork—one set of laws obtaining at one time or place, for example, and a different set of laws obtaining at a different time or place. We observe nothing of the sort, however. On the contrary, the unity of the world, the fact that it exhibits a uniform structure, that it is a single cosmos, strongly suggests some sort of unity in its cause—that there is either a single designer, or several designers acting cooperatively, perhaps under the direction of one of their number.