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WHEREVER their investigations lead, all analysts of religion begin somewhere. And in the final lines of his densely but skilfully packed account of faith from the viewpoint of evolutionary biology, Nicholas Wade recalls the place where he first felt sanctity: Eton College chapel.

The “beauty of holiness” in a British private school is a far cry from the sort of religion that later came to interest him as a science journalist at Nature magazine and then the New York Times. To examine the roots of religion, he says, it is important to look at human beginnings. The customs of hunter-gatherer peoples who survived into modern times give an idea of religion’s first forms: the ecstasy of dusk-to-dawn tribal dances, for example.

Charles Darwin, whose idea of the sacred also came from an English private school, witnessed religion at its most primordial when he went to Australia in 1836. He found it horrifying: “nearly naked figures, viewed by the light of blazing fires, all moving in hideous