Interesting, I also feel like I've been fighting this fight (in person, in debates that were a side project of our academic decathlon club) since I was a teenag

Interesting, I also feel like I've been fighting this fight (in person, in debates that were a side project of our academic decathlon club) since I was a teenager, and learned some of the same lessons. Though I don't know that it's zero-sum: I don't think flat eartherism, evolution denial, anti-vaxxism or the like "made way" for Trumpism in the sense that they became less popular and Trumpism became more popular; it might be the other way around, that these tend to reinforce each other and have a large overlap. There seems to be an undercurrent in all of them that you can simply deny and disbelieve the facts you don't like and make them go away.