That school of medical philosophy and therapy founded by the American messianic nature therapist Samuel Thomson (b. 1769). Thomson's great axiom was, "Heat is life, and cold is death." He lived in New England, which explains some of this. He and the later Thomsonians made great use of vomiting, sweating, and purging to achieve these ends...crude by present standards, but saner than standard medicine of the times (mercury, lead, bleeding, etc.). The Thomsonians split vehemently from the early Eclectics before the Civil War; the latter, larger group preferred to train professional physicians as M.D.s. The first group disavowed any overt medical training ("physicking") although the small medical sect of Physio-Medicalists, with several medical schools and some east-coast physician converts, used Thomsonian precepts within an otherwise orthodox armamentarium.. Their training, however, became less rigorous and more charismatic in time, and, unlike the Eclectic Medical Schools that, with one exception, chose to change to an A.M.Asupported curriculum to stay in business (thereby selling their souls), the Physio-Medicalist schools were too radical and erratic, and faded into history as their graduates were left, finally, with only Michigan allowing them to practice.