[E]ven though it is quite true that any radical eugenic policy will be for many years politically and psychologically impossible, it will be important for UNESCO to see that the eugenic problem is examined with the greatest care, and that the public mind is informed of the issues at stake so that much that now is unthinkable may at least become thinkable. --Julian Huxley  High school and college textbooks from the 1920s through the 1940s often had chapters touting the scientific progress to be had from applying eugenic principles to the population. Many early scientific journals devoted to heredity in general were run by eugenicists and featured eugenics articles alongside studies of heredity in nonhuman organisms. Even the names of some journals changed to reflect new attitudes. For example, "Eugenics Quarterly" became "Social Biology" in 1969 (the journal still exists today, though it looks little like its predecessor). Notable members of the American Eugenics Society (1922–94) during the second half of the 20th century included Joseph Fletcher, originator of Situational ethics; Clarence Gamble of the Procter & Gamble fortune; and Garrett Hardin, a population control advocate and author of the essay "The Tragedy of the Commons". In the United States, the eugenics movement had largely lost most popular and political support by the end of the 1930s, while forced sterilizations mostly ended in the 1960s with the last performed in 1981. Many US states continued to prohibit biracial marriages with "anti-miscegenation laws" such as Virginia's Racial Integrity Act of 1924, until they were overruled by the Supreme Court in 1967 in Loving v. Virginia. The Immigration Restriction Act of 1924, which was designed to limit the immigration of "dysgenic" Italians, and eastern European Jews, was repealed and replaced by the Immigration and Nationality Act in 1965. However, some prominent academics continued to support eugenics after the war. In 1963 the Ciba Foundation convened a conference in London under the title "Man and His Future", at which three distinguished biologists and Nobel laureates (Hermann Muller, Joshua Lederberg, and Francis Crick) all spoke strongly in favor of eugenics. A few nations, notably the Canadian province of Alberta, maintained large-scale eugenics programs, including forced sterilization of mentally handicapped individuals, as well as other practices, until the 1970s. Beginning in the 1880s, the history and concept of eugenics were widely discussed as knowledge about genetics advanced significantly, making practical genetic engineering, which has been widely used to produce genetically modified organisms, with genetically modified foods being most visible to the general public.