Why would the first human beings with enough sense to reason things create a "god"? If they were wondering what happened to them when they died why would they create the thought of a higher being in which could not been seen nor heard. This would be non-sense to anyone who heard it, and would not be passed on through out history until it became such a massive debate like it is. Some where a real God would have to speak to humans, in which the bible has many such occurances. This is one reason why I believe in God.