Even "white power" was a slogan adopted as a reactionary response to black power movements beginning in the 60s. That and white Christian nationalism are the earliest origins of the modern organized militant racist movements we see now. Seriously though check out that book, I've done a lot of reading on this specific topic trying to understand how we got where we are (and how one of my friends became a Nazi) and while I knew a lot of the broad strokes Belew is very thorough and it includes a lot of details I had not found elsewhere.