People of the Druze faith practice endogamy, because only children of two Druze parents can be Druze.
Which seems fine until you think about how farmemory and reincarnation actually
work. You've got this bunch of souls who are all by now quite attached to each other, and some who have gotten sick of each other. So while a lot of them are still huddling together, there are some who go wandering. They fall in love with somebody new. And it doesn't matter what the
religion says, some of those kids are going to have Druze souls. Now what in the merry hell do you do with kids who have Druze memories but aren't allowed into the culture? That has got to be a mess.
I've actually met a Druze person, in college, and we had a lot of fun. Well, I was the only other person with farmemory, so it was kind of inevitable. It's a fascinating religion.
But damn, I'm glad I don't have to clean up after that.