 And I think we have to recognize how that drives us toward tribalism, because just think about the protests on campus in the last few months. There are things about them that are completely different than the protests of the 1960s, where you were really trying to persuade other people. Most of these protests right now aren't trying to persuade other people. They're trying to signal to the closest kin around you that you're pure and deeper in your commitment to the cause. And that's really different than a big, broad American idea where persuasion is more important than violence.