Eugenics is a bio-social movement which advocates the practice that very talented people should spread their genes by having more children, and less talented people should be discouraged from spreading their genes. Its goal is to improve the genetic composition of a population by manipulating the human reproduction process. The origins of eugenics date back to certain interpretations of Mendelian inheritance, and the theories of August Weismann which viewed eugenics as a science consistent with the views of Darwinism and Social Darwinism. New DNA tests suggest Bertold Wiesner, the owner of a British fertility clinic in the 1940s, may have fathered as many as 600 children by secretly donating to the clinic's sperm bank. The clinic was responsible for helping more than 1,500 families conceive their children.