“Fantasyland: How America Went Haywire: A 500 Year History.” by Kurt Andersen
and found it very enlightening. Note that it was published in 2017 so doesn’t cover any of the more recent beliefs. As I recall it mentions Trump a little, but way more ink is spilled covering the history of crazy in America. (Of which we have a very long involved history.) Bottom line, I highly recommend it.
