By Mat Savelli & Erika Dyck
Contagious diseases are usually understood as physical illnesses, but the rather less orthodox idea of infectious mental diseases is worth considering. Historically, public health officials, immigration officers and well-meaning social reformers harnessed the language of madness, mental deficiency and mental illness to galvanize a popular response against the threats posed by such afflicted individuals to the larger body politic. Early 20th century reformers lobbied governments to stem the tide of feeblemindedness, arm themselves against the hereditary toxins evident in families ‘soaked’ with deficiency, or to segregate people whose feeblemindedness polluted an otherwise wholesome stock of superior humans. The language of mental disease and degeneration sat comfortably with the moralizing tones of public health officials who were keen to sanitize their communities by keeping mental illness out, through immigration restrictions, or marriage regulations, and some went further to treat this infectious possibility through institutionalization and even more overt eugenic measures such as sexual sterilization. Although we might now balk at the unsophisticated collusion of moral reform and the most basic science of heredity of the early 20th century, the spectre of madness as a contagious phenomenon has continued to evolve into a modern menace. Continue reading