This post is posted in case anyone claims credit for my pet theory:
It's called Big Bruce's Pet Theory of Organized Religion. It states that some people have a genetic predisposition for pontificating, and this trait accounts for the popularity of religion, and for the direction religeon takes.
Absent of this gene for Baptist style hard ball preaching, people might find other explanations for life on Earth and for outer space, as well as other views on after-life. Or there could be no religion at all.
More pet theories are in the works.