Let's try to bear in mind, folks, that this is a thread in the Psychology forum, not philosophy or speculations.
Andy Thomson, a practicing psychiatrist, uses his knowledge of the human mind and countless neuropsychological research studies to make the case of how religion and belief in god are by-products of our evolved neural architecture. Below is his talk titled 'Why We Believe in Gods' which he presented at the American Atheist 2009 convention in Atlanta, Georgia.
I think it pertains closely to the OP. Press play. Use full screen.
Let us know what you think.