Tinsley Harrison doctor, teacher, researcher, editor, writer, and father was one of the most important medical figures of the 20th century. He edited the first five editions of Harrison's Principles of Internal Medicine, regarded as a quintessential medical text. He traveled the world in his capacity as a teaching doctor, made significant contributions to scholarship, and served as the dean at three different medical schools. He was a titan of the field, an ermous presence central to the narrative of American medicine. No significant biography has been written about him until w.