Modern atheistic theories of the origin of man are built on massive suppositions. We think of so called cavemen as brutish ape like creatures who

drag women off to their caves and beat eachother with clubs, but we have zero evidence for that. The cave paintings we have would indicate that man was far more sophisticated in the prehistoric age. It is far more reasonable to believe, based on the archaeological evidence that we have, that prehistoric man had religion and art than it is to think of him as some sort of ape mind in a human brain.