. . . What to do with the hopelessly unfit? I had thought at a younger time of my life that the legalizing of euthanasia . . . Now my face is set against the legalization of euthanasia for any person, who, having been well, has at last become ill . . . But I am in favor of euthanasia for those hopeless ones who should never have been born-Nature’s mistakes.
. . . should the social organism grow up and forward to the desire to relieve decently from living the utterly unfit, sterilize the less unfit, and educate the still less unfit-then the Law must also grow, along with the amplitude of our new ideas for a wiser and better world, and fit the growing organism easily and well; and thereafter civilization will pass on and on in beauty.
Kennedy F. The Problem of Social Control of the Congenital Defective: Education, Sterilization, Euthanasia. Am J Psychiatry. 1942 Jul;99(1):13-16.