I've been reading an article in the Economist about Scientific Research being financed by the European Union on the relation between religion and evolution, trying to understand why so many people in the world believe in the existence of a supreme being, despite the obvious absence of any support whatsoever. The article was describing some "scientific" experiments that in my view are just ridiculous, but one of the underlying theories was the one of the "natural selection". This point of view, that in some way is hilarious for this Darwinian theory is so uncomfortable for children of God, is more or less consistent with my idea on the matter. I have this belief, that peoples' life is meaningless. When, on top of that, you have to live a miserable life of restraints and despair, either you find a reason to keep going or what's the purpose? And there it comes, God, the heaven, the promises after life, and so on. Faith helps you going on, fair enough. That's also why religiosity is more widespread where populations are poor and uneducated.
A consequence of this is that, at least in my perception, religious people is usually advantaged in finding reasons to be happy and things to enjoy in life. They are less likely to spend Easter day home alone in front of a PC screen, too. This is not exactly the sort of things that help preserving your DNA and your culture. By the way, today it snows.