Samuel Hahnemann (1755–1843), a German physician, is credited with founding homeopathy, an alternative medical system based on the principle that "like cures like." His dissatisfaction with traditional practices, such as bloodletting, led him to develop a method grounded in observing how substances affect healthy individuals, asserting that remedies producing symptoms similar to a disease could treat it.
Authors like Frederick Hiller and Isabella Beeton emphasized his precise approach, highlighting his dependence on experimentation and dismissal of theoretical speculation. The Encyclopædia Britannica noted his 1796 formulation of the "law of similars," while critics like Dan King debated his legacy, questioning whether his work was philosophical or mere quackery. Hahnemann’s innovations, including dilution and succussion, transformed therapeutic approaches, leaving a controversial yet lasting influence on medicine.