11th July 2020

“One hypothesis for the origin of religion is that it's a kind of 'costly signaling' – a way for people to prove their loyalty to the group by participating in complex rituals and extravagant shows of devotion. But there's an under-appreciated danger to this: when everyone in a community already follows a strict interpretation of faith, religious belief will have a tendency to spiral out of control into extremism, as group members go to greater and greater lengths to express their piety.”

Adam Lee