Even before the Nazi Party came to power, the doctors of Weimar Germany began to divide humanity into those who should live and those who should die. They developed the category of “life unworthy of life” in order to designate those whose infirmity, deformity, race, or lifestyle rendered them subhuman in terms of rights.
Similarly, the eugenicists of the twentieth century — in America as well as in Europe — divided humanity into the “fit” and the “unfit,” and called for more children from the fit, less from the unfit.