> I suspect the biggest source of moral taboos will turn out to be power struggles in which one side only barely has the upper hand. That's where you'll find a group powerful enough to enforce taboos, but weak enough to need them.
It's especially powerful when paired with this question:
> Let's start with a test: Do you have any opinions that you would be reluctant to express in front of a group of your peers?
Combining the two yields an odd idea. The group likely to have the most things they're afraid to say out loud will be the group that was recently strong enough to enforce taboos, but is not now.
One such group is white, straight males in the US.