Read More Skeptic The origin of chiropractic medicine has long been under dispute, with most modern chiropractors denying that its purported founder, D.D. Palmer, copied osteopathy. Yet, the two schools of thought were nearly identical at their beginnings, and just a few hours apart by railway. Further, chiropractic was “discovered” the same year—1895—that the first class of the American School of Osteopathy (ASO) was graduated. Chiropractors dismiss the sudden emergence of chiropractic so near in time and space to the ASO as a one-in-a-million coincidence. This article shows why one-in-a-million is not a coincidence.