From Salon’s “Religious belief itself is an adaptation“, an interview with Edward O. Wilson:
Religious belief itself is an adaptation that has evolved because we’re hard-wired to form tribalistic religions. Religion is intensely tribalistic. A devout Christian or Muslim doesn’t say one religion is as good as another. It gives them faith in the particular group to which they belong and that set of beliefs and moral views. …
You cannot explain the patterns of diversity in the world, the geography of life, the endless details of distribution, similarity and dissimilarity in the world, by any means except evolution. That’s the one theory that ties it together. It is very hard to see how traditionalist religious views will come to explain the meaning of life on this planet. …