Collectively, the less religion plays in a society the better. Fundamentalists of developed and undeveloped societies don't appear to handle conflict in a sensible manner. Fundamentalists aren't able to tolerate anybody with different lifestyles whereas secularism encourages it. Basically left wing ways of dealing with conflict and local social ales tend to be the ways of secular societies, and they get along just fine and perform better socially. The religious tend to be on the right. The American right wing is frightening to the rest of the world, especially if you are a Muslim. With Muslims, even moderates tend to be right wing.