@wynn --
So much for the God-gene camp!
Not that there ever was much hope for the god-gene camp anyways.
So where do supernaturalism or theism come from?
If they are not in the DNA, if they are not real/true, where do they come from?
Supernaturalism most likely stems from what appears to be a natural form of dualism on our parts, arising from the illusory mind/body separation produced by our brain's higher functioning. We experience ourselves as two "different" things(and this is reflected in our speech patterns, note how we talk about "our body" in much the same way that we would talk about "our car") without ever realizing that the very separation we experience is a direct side effect of what our brains do to survive(and without ever being viscerally aware of what's going on "beneath" our thoughts).
Theism, of all sorts, is almost certainly an outgrowth of our natural agency detection faculties. At some point in our evolutionary past it became advantageous to assign agency, to assume a being of some sort were the cause, to movements and changes we detected in our environment. In most(if not all) primate species, and in many species associated with humans(i.e. domesticated species) we've discovered heightened agency detection instincts in that they have a rather large tendency to assign agency to events that weren't caused by an agent(such as lightning, or the sun rising).
Over time this tendency likely grew in sophistication as our brains did. In other words, the more we learned and observed the world the more sophisticated the agents we assigned natural phenomenon to became, thus opening the way for the first gods to be invented.
Completely natural and it fits the facts.
Delusion? And where does delusion come from?
Delusion usually comes from some sort of imbalance in the brain. It could be caused by infections, increased cranial pressure putting an extra squeeze on the brain, in fact any number of things(including some of our brains completely natural functions that it performs daily, such as the creation of false memories and the editing of real ones).