When I was in my late 20s and early 30s I got into the whole Sally Fallon/Nourishing Traditions / Weston A. Price thing. And in my 40s, I learned how a lot of those philosophies, plus the overlap with Waldorf education, came out of the 1920s-1930s eugenics movement… and then a whole bunch of things suddenly made a lot of sense about many of the people I met then, and their almost fanatical devotion to raising natural, pure, unblemished children.