"Feeble-mindedness is at the root of probably two-thirds of the problems that you have before you. The cause was defective ancestry."
A methodical and well-researched documentary, part of PBS's American Experience series, The Eugenics Crusade is the best film about this abhorrent yet misunderstood "science" that began as a twisted take on heredity and evolution more than a century ago.
I say "misunderstood" mostly as a way of indicating that many claim eugenics in America as a fringe study only followed by quack doctors and outwardly racist psychologists. However, as this film assuredly notes, it was significantly more widespread than most realize.
Extrapolating from the work of animal breeders -- and rediscovered research from Gregor Mandel (yeah, the pea pod…