Storytelling is one of the few human traits that are truly universal across culture and through all of known history. Anthropologists find evidence of folktales everywhere in ancient cultures, written in Sanskrit, Latin, Greek, Chinese, Egyptian and Sumerian. People in societies of all types weave narratives, from oral storytellers in hunter-gatherer tribes to the millions of writers churning out books, television shows and movies. And when a characteristic behavior shows up in so many different societies, researchers pay attention: its roots may tell us something about our evolutionary past.

Let’s grant that science and religion are not incompatible—there are after all some (though not many) excellent scientists, like Charles Townes and Francis Collins, who have strong religious beliefs. Still, I think that between science and religion there is, if not an incompatibility, at least what the philosopher Susan Haack has called a tension, that has been gradually weakening serious religious belief, especially in the West, where science has been most advanced.