It might easily be made a physical impossibility for criminals, hereditary paupers, imbeciles, profligates, and others suffering from gross bodily or mental defects, to propagate their failings and their vices. In no long time our prisons, workhouses, and asylums would be empty.... Prostitution would become a forgotten calling. Pauperism would cease. Disease would be almost unknown. By the same methods which breeders adopt, our race could be raised to the highest pitch of perfection and of excellence. The people who shall first have the moral courage to do this, will take the lead among the nations of the world.