When people claim religion is harmless.

[John V]

Depends on whether you subscribe to natural selection at the group level. If you do, then my conclusion follows.

Uh, what?

Think it through. It's not difficult. Different groups of people competed with each other. From an evolutionary perspective, they didn't begin with religion. Religion came in at some point. If religion were deleterious to the survival of the group, it would have been eradicated. But, it fixed in practically all groups. That indicates that it's advantageous.