Eugenics (/juːˈdʒɛnɪks/ yoo-JEN-iks; from Ancient Greek εύ̃ (eû) 'good, well' and -γενής (genḗs) 'born, come into being, growing/grown')[1] is a set of beliefs and practices that aim to improve the genetic quality of a human population.[2][3][4] Historically, eugenicists have altered various human gene frequencies by inhibiting the fertility of people and groups they considered inferior, or promoting that of those considered superior.[5]
The contemporary history of eugenics began in the late 19th century, when a popular eugenics movement emerged in the United Kingdom,[6] and then spread to many countries, including the United States, Canada, Australia,[7] and most European countries (e.g. Sweden and Germany). In this period, people from across the political spectrum espoused eugenic ideas. Consequently, many countries adopted eugenic policies, intended to improve the quality of their populations' genetic stock.
Historically, the idea of eugenics has been used to argue for a broad array of practices ranging from prenatal care for mothers deemed genetically desirable to the forced sterilization and murder of those deemed unfit.[5] To population geneticists, the term has included the avoidance of inbreeding without altering allele frequencies; for example, British-Indian scientist J. B. S. Haldane wrote in 1940 that "the motor bus, by breaking up inbred village communities, was a powerful eugenic agent."[8] Debate as to what exactly counts as eugenics continues today.[9] Early eugenicists were mostly concerned with factors of measured intelligence that often correlated strongly with social class.
Although it originated as a progressive social movement in the 19th century,[10][11][12][13] in contemporary usage in the 21st century, the term is closely associated with scientific racism. New, liberal eugenics seeks to dissociate itself from old, authoritarian eugenics by rejecting coercive state programs and relying on parental choice.[14]
what is termed in Greek, eugenes namely, good in stock, hereditarily endowed with noble qualities. This, and the allied words, eugeneia, etc., are equally applicable to men, brutes, and plants. We greatly want a brief word to express the science of improving stock, which is by no means confined to questions of judicious mating, but which, especially in the case of man, takes cognisance of all influences that tend in however remote a degree to give to the more suitable races or strains of blood a better chance of prevailing speedily over the less suitable than they otherwise would have had. The word eugenics would sufficiently express the idea; it is at least a neater word and a more generalized one than viriculture which I once ventured to use.... The investigation of human eugenics – that is, of the conditions under which men of a high type are produced – is at present extremely hampered by the want of full family histories, both medical and general, extending over three or four generations.
Racially targeted sterilization practices between the 1960s and the present have been perhaps the most common topic among scholars arguing for, and challenging, the ongoing power of eugenics in the United States. Indeed, unlike in the modern period, contemporary expressions of eugenics have met with widespread, thoroughgoing resistance
As an applied science, thus, the practice of eugenics referred to everything from prenatal care for mothers to forced sterilization and euthanasia. Galton divided the practice of eugenics into two types—positive and negative—both aimed at improving the human race through selective breeding.