[gerbal]

With those assumptions, it seems fair to state that, given enough time, any sufficiently large group of humans will commit an atrocity against an internal or external minority.

Shouldn't then societies try to structure themselves against this tendency?

[luckylion]

I don't know how you'd structure a society against hate. We can't seem to even come together over political ideas within cultures, where everything else is very similar, so I don't have a lot of hope for situations where the similarities are few and far between.

We haven't tried adding empathogens to the water supply, maybe that's a good way to do it.