Evolution and Wisdom of Crowds
I am convinced that just as often, the cause and effect is reversed: people hold onto their fundamentalist religious beliefs because evolution by natural selection -- the strongest argument against an Old Testament-type creator -- is so counter-intuitive to so many.
I arrive at this conclusion in a somewhat roundabout way. I have long been fascinated with systems that tap into the "wisdom of crowds" -- systems that, in fact, have much in common with Darwinian evolution. Such systems doubtfully conflict with anyone's religion, and yet, I see the same sort of resistance to them as I see to evolution. The arguments against them are remarkably similar.