Eugenics.
Eugenics is the use of selective breeding techniques on humans which previously had only been used for the creation of new varieties of crops and domestic animals. Selective breeding for eugenics is applied to humans with the aim of "improving" the human species genome in other words our genetics. Recently this definition has to be expanded to include genetic engineering as well as selective breeding. Just like genetic engineering can be used to improve varieties of domestic plants and animals so can it be used to "improve" humans, as is demonstrated in the book "Twenty First Century Overman."
Eugenics was widely popular in the early decades of the 20th century but has largely fallen into disrepute after having become associated with Nazi Germany. Since the postwar period both the public and the scientific communities have associated eugenics with Nazi abuses such as enforced racial hygiene human experimentation and the extermination of "undesired" population groups. However, developments in genetic engineering technologies at the end of the 20th century have raised much new interest about the meaning of eugenics and its ethical and moral status in the modern era. If you are interested in this subject then I strongly recommend that you read "Twenty First Century Overman" which will explain clearly and concisely what is eugenics; including the eugenics of the past and the eugenics of the future. Click here to learn more about "Twenty First Century Overman."