Nope they're literally just random fucking people who try to rip your head off then say they cured your deteriorating joints.

Yeah the origins of chiropracty seem to be in the late 1800s or early 1900s, basically one of the few offshoots of 'vitalism' that still remains quite prevalent.

There is no conclusive evidence that it really works at all, and there are a significant number of injuries that it has caused, as you can basically get a Doctor of Chiropracty from, at worst, a diploma mill, and at best, roughly the equivalent of getting a 'degree' in homeopathy or reiki, after maybe a few months of instruction.