 Some philosophers believe that the randomness of Darwinian natural selection rules out the possibility of any kind of divine guidance being exercised through such a process. Some thinkers, including both some atheists and some proponents of what is called “creation science,” believe that evolution and God are rivals, mutually exclusive hypotheses about the origins of the natural world. What can be explained scientifically needs no religious explanation. However, this is far from obviously true; in fact, if theism is true it is clearly false. From a theistic perspective to think that God and science provide competing explanations fails to grasp the relationship between God and the natural world by conceiving of God as one more cause within that natural world. If God exists at all, God is not an entity within the natural world, but the creator of that natural world, with all of its causal processes. If God exists, God is the reason why there is a natural world and the reason for the existence of the causal processes of the natural world. In principle, therefore, a natural explanation can never preclude a theistic explanation.  Any argument that natural explanations preclude or are in tension with theistic explanations will in fact be theological in character, since they will be grounded in assumptions about the kind of world God would create.