 We know that now, and there have been recurring doubts about that, which I talk about in the book too, especially in the 20th century after each of the world wars. So just empirically, that's a fallacy, right? And then the danger of that idea is the other point that you brought up, that it's because of that kind of almost blind faith in the idea that history must be a story of progress, which is born during the Enlightenment,