Scientist's Theory Says Religion Key to Humans' Social Evolution

By Zauzmer, Julie | Sunday Gazette-Mail, March 5, 2017 | Go to article overview

Scientist's Theory Says Religion Key to Humans' Social Evolution


Zauzmer, Julie, Sunday Gazette-Mail


BOSTON - In humans' mysterious journey to become intelligent, socializing creatures like no other in the animal world, one innovation played an essential role: religion. That's the theory that a preeminent evolutionary scientist is setting out to prove.

"You need something quite literally to stop everybody from killing everybody else out of just crossness, said Robin Dunbar. "Somehow, it's clear that religions, all these doctrinal religions, create the sense that we're all one family.

Dunbar, an evolutionary psychology professor at Oxford University, gained some measure of fame more than 20 years ago for his research on the size of animals' social networks. Each species of primate, he found, can manage to keep up a social bond with a certain number of other members of its own species. That number goes up as primates' brain size increases, from monkeys to apes.

Humans, Dunbar found, are capable of maintaining significantly more social ties than the size of our brains alone could explain. He proved that each human is surprisingly consistent in the number of social ties we can maintain: About five with intimate friends, 50 with good friends, 150 with friends and 1,500 with people we could recognize by name. That discovery came to be known as "Dunbar's number.

And then Dunbar turned to figuring out why Dunbar's number is so high. Did humor help us manage it? Exercise? Storytelling? That riddle has been Dunbar's quest for years - and religion is the latest hypothesis he's testing in his ongoing attempt to find the answer.

"Most of these things we're looking at, you get in religion in one form or another, he said.

Dunbar is just one of a recent wave of scientists who are interested in how religion came to be and how people have benefited from it. "For most of Western intellectual history since the Enlightenment, religion has been thought of as ignorant and strange and an aberration and something that gets in the way of reason, said Christian Smith, a sociologist at the University of Notre Dame who studies religion. "In the last 10 or 20 years on many fronts, there's been a change in thinking about religion, where a lot of neuroscientists have been saying religion is totally natural. It totally makes sense that we're religious. Religion has served a lot of important functions in developing societies.

In the case of Dunbar and his colleagues, they already published research demonstrating that two other particularly human behaviors increased people's capacity for social bonding. In the lab, they showed that first, laughter, and second, singing, left research subjects more capable of forming connections with other people than they were before.

Religion is the remaining key to explaining humans' remarkable social networks, Dunbar thinks. "These three things are very good at triggering endorphins, making us feel bonded, he said at the American Association for the Advancement of Science's annual meeting, where he presented his team's research on laughter and singing and introduced the forthcoming research on religion. …

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