Andrew Abbott in The System of Professions: An Essay on the Division of Expert Labor, one of the best books on the sociology of the professions ever written, presents systemic theory and data regarding the origin, growth, fusion, and fission of professions as they compete with each other over what he calls "workplace jurisdictions" [I]. Defining "professional power" as "the ability to retain jurisdiction when system forces imply that a profession ought to have lost it," he argues that "jurisdictional invasion generally begins in the workplace, then moves to the public mind, and then into the law." And he generalizes how long it usually takes for the system to equilibrate after a jurisdictional challenge: "Jurisdictions are renegotiated in workplaces over twoto threeyear periods, in (the public's mind) over tento twenty-year periods, in the law over twentyto fifty-year periods." That fits almost precisely osteopathy and chiropractic, both of which invaded the medical marketplace at the end of the last century, osteopathy coming first. Its founder Andrew Taylor Still was a frontier doctor who, having lost three children to an 1864 meningitis epidemic, "flung to the breeze the banner of osteopathy" in the 1870s and established the first osteopathic school in Kirksville, Missouri, in 1892 [2]. Chiropractic was "discovered" by Daniel David Palmer in 1895 at Davenport, Iowa, less than 150 miles from Kirksville, although he began using the word "chiropractic" only in the following year [3]. He began teaching it in 1898 but did not change the name of his school from "Palmer's School of Magnetic Cure" to "Palmer Infirmary and Chiropractic Institute" until 1902 [4]. Both Still and Palmer had earlier practiced magnetic healing, and Still had even advertised himself as a "lightning bonesetter" [5].