[1] Most famously known as Franklin Delano Roosevelt's personal doctor, Draper was also a well known constitutionalist and eugenicist.
Constitutionalist like Draper placed importance on aspects of a patient's constitution – this included heredity, their environment, and their personality.
[4] He also countered the importance of disease itself – medicine had been focused on classifying disease ever since the rise of hospital medicine in the early 1800s, and Draper called back instead to a prior time, when humoral theory and the individual were more important in a medical diagnosis.
Draper defined a disease not as its own entity but as a thing carried by an individual, similar to humoral theory.
Draper took these four "panels" of personality and would analyze them for large populations from his clinic and found certain combinations and repetitive patterns.
Instead, Draper introduced a concept of classifying the human race based on disease susceptibility.
Aside from his Constitutional Clinic, Draper was a well-known expert in polio, and personally attended to Roosevelt after his return from Campobello more than a month after the onset of his 1921 paralytic illness.