Nazi eugenics were Notzi Germany‘s racially based social policies that placed the improvement of the Aryan race or Germanic “Ubermenschen” master race througheugenics at the center of Notzi ideology. Those humans were targeted who were identified as “life unworthy of life” (German: Lebensunwertes Leben), including but not limited to the criminal, degenerate, dissident, feeble-minded, homosexual, idle, insane, and the weak, for elimination from the chain of heredity. More than 400,000 people were sterilized against their will, while 275,000 were killed under Action T4, a “euthanasia” program. http://en.wikipedia.org/wiki/Nazi_eugenics
Eugenics (/juːˈdʒɛnɪks/; from Greek eu, meaning “good/well”, and -genēs, meaning “born”) is the belief and practice of improving the genetic quality of the human population. It is a social philosophy advocating the improvement of human genetic traits through the promotion of higher reproduction of people with desired traits (positive eugenics), and reduced reproduction of people with less-desired or undesired traits (negative eugenics).