Anyone familiar with David Sloan Wilson's - "Darwin's Cathedral" ?

(Wiki blurbs)

David Sloan Wilson (born 1949) is an American evolutionary biologist and a Distinguished Professor of Biological Sciences and Anthropology at Binghamton University. He is a son of the author Sloan Wilson.

Wilson's book Darwin's Cathedral proposes that religion is a multi-level adaptation (group selection), a product of cultural evolution developed through a process of multi-level selection for more cooperative and cohesive groups.

http://en.wikipedia.org/wiki/David_Sloan_Wilson

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Group selection

Group selection refers to one mechanism of evolution in which natural selection acts at the level of the group instead of at the more conventional level of the individual. Many species have a social structure in which individuals form groups and interaction among members within each group is much more frequent than interaction of individuals across groups.

http://en.wikipedia.org/wiki/Group_selection