Whoa - I had no idea there was once a book called "Bonesetting, Chiropractic, and Cultism" - but (once again proving ignorance isn't bliss) I guess there was:
When I published by book Bonesetting, Chiropractic, and Cultism in 1963, one chapter was devoted to “Chiropractic Technique Wars.” Dozens of different chiropractic techniques were being used by chiropractors who claimed that their method of adjusting...was the most effective way to cure disease...The Palmer School of Chiropractic,...was teaching the H.I.O. (hole-in-one) technique,...B.J. Palmer, the developer of chiropractic, eventually theorized that...it was only necessary to adjust the atlas... ─ a departure from the revelations of D.D. Palmer, the founder of chiropractic, who claimed that he had cured deafness and heart disease by adjusting a thoracic vertebra.
So get that: the founder, developer, and school, all disagreed on what they were supposed to be experts on, and people bought it. Still buy it. Who says otherwise?
Cultism is a trip.