One simple and single idea can change the world. Newton, Einstein, Edison, Ford, the Wright brothers, all changed the world with their ideas! So did DD Palmer when he gave his first adjustment on Harvey Lillard in 1895. And his simple, single idea was not the adjustment of the spine, since that has been done for thousands of years. DD Palmer's new idea was the concept that chiropractic is "founded on tone." DD Palmer was already speaking neurology 126 years ago!