See also “Homeopathy’s Rocky Road: Will the Castoff Practice Ever Join Mainstream Medicine?” Homeopathy: A Timeline 1796: Samuel Hahnemann first describes the Law of Similars (“Like cures like”). 1830s: Homeopathic schools begin to open in the United States. 1838: Repertory to the More Characteristic Symptoms of Materia Medica, a homeopathic reference, first appears in English. […]