I have to consider your point, namely since we did have records in our history there is always been a "SUPREME" and that may be interpret with a fact that human being needs some thing superior to him to believe, to lay your troubles, something that may help you.. etc.. and this is intrinsic in human personality, meaning, some thing or some one that could help you in what you wish.
To substantiate my point, we had Buddha, Confucio, Manitou, Hallah, God... etc. etc.. etc..and there are going to be many others that I don' know or I have forgotten. The issue is now, there is really some one which is identified with the different name depending of the tribe, no one knows, however, I am of the opinion that we are just one of the species on this hearth and because we do have intelligence, we assume to be a greater entity that protect us.. etc..
I ma trying to visualize the universe and comparing it with hour hearth and if it is not a figment of our imagination why we should have someone supreme that takes care of us ???