Could it be that lack of explanation for natural phenomenon such as weather, life/death, sunrise, etc is reason enough for most beliefs in God? Religious doctrine would seem to come later. The need to establish law within hominid groups could also be a good use for God(s) once they exist. Did the belief start long ago before hominids populated the entire Earth or did it evolve on seperate occasions in different places for different reasons? It would seem a bit of a stretch for it to evolve much later when so many pockets of isolated hominids stretched the Earth. God and religion is so widely spread that one would assume it is a very very old idea without doing any research.
I think therefore I am...busy
™ Version 4.2