Eugenics: This is the study of improvement of human races by applying the genetic laws. In other words Eugenics is the bio-social movement & applied science that advocates the use of improving the genetic composition of a population" which usually referring to human populations. Eugenics science was very popular in the early decades of the 20th century.
Some people think that objections to eugenics only arose because of the Nazis and other Fascists but in actual the founder of modern Cultural Anthropology is Franz Boaz. The developments into genomic, genetic or reproductive technologies at the end of the 20th century have raised many new questions or concerns about the meaning of eugenics or its ethical or moral status in the modern era and effectively creating a resurgence of interest in eugenics.