L'eugenèsia va arribar a jugartenir un paper destacat en aquest pensament racial com una forma de millorar i mantenir la «puresa» de la raça ària. L'eugenèsia va ser un concepte respectat per molts pensadors entre 1900 i 1940, com [[Margaret Sanger]],<ref>Margaret Sanger, quoted in {{ref-llibre|cognom=Katz|nom=Esther|coautors =Engelman, Peter|títol=The Selected Papers of Margaret Sanger|editorial=University of Illinois Press|lloc=Champaign, IL|any=2002|pàgina=319|isbn=9780252027376|citació=Our...campaign for Birth Control is not merely of eugenic value, but is practically identical in ideal with the final aims of Eugenics}}</ref><ref>{{ref-llibre|cognom=Franks|nom=Angela|títol=Margaret Sanger's eugenic legacy|editorial=McFarland|lloc=Jefferson, NC|any=2005 |pàgina=30 |isbn=978-0-7864-2011-7 |citació=...her commitment to eugenics was constant...until her death}}</ref> [[Marie Stopes]], [[H.G. Wells]], [[Woodrow Wilson]], [[Theodore Roosevelt]], [[Emile Zola]], [[George Bernard Shaw]], [[John Maynard Keynes]], [[John Harvey Kellogg]], [[Linus Pauling]]<ref>Everett Mendelsohn, Ph.D. [http://harvardmagazine.com/2000/03/the-eugenic-temptation.html Pauling's Eugenics], ''The Eugenic Temptation'', Harvard Magazine, March–April 2000</ref> i [[Sidney Webb]].<ref>{{ref-llibre
| cognom =Gordon | nom =Linda
| títol =The Moral Property of Women: A History of Birth Control Politics in America
