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| The adjective "dysgenic" is the antonym of "]". In 1915 the term was used by ] to describe the supposed deleterious effects of modern warfare on group-level genetic fitness because of its tendency to kill physically healthy men while preserving the disabled at home.<ref name="Jordan">{{cite book| last = Jordan| first = David Starr| title = War and the Breed: The Relation of War to the Downfall of Nations| publisher = University Press of the Pacific| year= 2003|edition=Reprint| isbn = 978-1-4102-0900-9|location = Honolulu}}</ref><ref name=":1">{{Cite book|last=Carlson|first=Elof Axel|title=The Unfit: A History of a Bad Idea|publisher=Cold Spring Harbor Laboratory Press|year=2001|isbn=9780879695873|pages=189–193}}</ref> Similar concerns had been raised by early eugenicists and ] during the 19th century, and continued to play a role in scientific and public policy debates throughout the 20th century.<ref>{{Cite book|last=Carlson|first=Elof Axel|title=The Unfit: A History of a Bad Idea|publisher=Cold Spring Harbor Laboratory Press|year=2001|isbn=9780879695873}}</ref> More recent concerns about supposed dysgenic effects in human populations have been advanced by the controversial psychologist ], notably in his 1996 book '']'', which argued that a reduction in ] and decreased ] since the ] have resulted in an increased propagation of deleterious traits and ]s.<ref name="Dysgenics 1996">Richard Lynn: ''Dysgenics: genetic deterioration in modern populations'' ], Connecticut. : Praeger, 1996., {{ISBN|978-0-275-94917-4}}.</ref> In popular culture, concerns about dysgenics have also formed the basis for ], notably the 2006 film '']''. | The adjective "dysgenic" is the antonym of "]". In 1915 the term was used by ] to describe the supposed deleterious effects of modern warfare on group-level genetic fitness because of its tendency to kill physically healthy men while preserving the disabled at home.<ref name="Jordan">{{cite book| last = Jordan| first = David Starr| title = War and the Breed: The Relation of War to the Downfall of Nations| publisher = University Press of the Pacific| year= 2003|edition=Reprint| isbn = 978-1-4102-0900-9|location = Honolulu}}</ref><ref name=":1">{{Cite book|last=Carlson|first=Elof Axel|title=The Unfit: A History of a Bad Idea|publisher=Cold Spring Harbor Laboratory Press|year=2001|isbn=9780879695873|pages=189–193}}</ref> Similar concerns had been raised by early eugenicists and ] during the 19th century, and continued to play a role in scientific and public policy debates throughout the 20th century.<ref>{{Cite book|last=Carlson|first=Elof Axel|title=The Unfit: A History of a Bad Idea|publisher=Cold Spring Harbor Laboratory Press|year=2001|isbn=9780879695873}}</ref> More recent concerns about supposed dysgenic effects in human populations have been advanced by the controversial psychologist ], notably in his 1996 book '']'', which argued that a reduction in ] and decreased ] since the ] have resulted in an increased propagation of deleterious traits and ]s.<ref name="Dysgenics 1996">Richard Lynn: ''Dysgenics: genetic deterioration in modern populations'' ], Connecticut. : Praeger, 1996., {{ISBN|978-0-275-94917-4}}.</ref> In popular culture, concerns about dysgenics have also formed the basis for ], notably the 2006 film '']''. | ||
| Despite these concerns, genetic studies have shown no evidence for dysgenic effects in human populations.<ref>{{Cite journal|last1=Conley|first1=Dalton|last2=Laidley|first2=Thomas|last3=Belsky|first3=Daniel W.|last4=Fletcher|first4=Jason M.|last5=Boardman|first5=Jason D.|last6=Domingue|first6=Benjamin W.|date=14 June 2016|title=Assortative mating and differential fertility by phenotype and genotype across the 20th century|journal=Proceedings of the National Academy of Sciences|volume=113:24|issue=24|pages=6647–6652|doi=10.1073/pnas.1523592113|pmid=27247411|pmc=4914190|doi-access=free}}</ref><ref>{{Cite journal|last1=Bratsberg|first1=Bernt|last2=Rogeberg|first2=Ole|date=26 June 2018|title=Flynn effect and its reversal are both environmentally caused|journal=Proceedings of the National Academy of Sciences|volume=115:26|issue=26|pages=6674–6678|doi=10.1073/pnas.1718793115|pmid=29891660|pmc=6042097|doi-access=free}}</ref><ref>{{Cite book|last=Neisser|first=Ulric|title=The Rising Curve: Long-Term Gains in IQ and Related Measures|publisher=American Psychological Association|year=1998|isbn=978-1557985033|pages=xiii–xiv|quote=There is no convincing evidence that any dysgenic trend exists. . . . It turns out, counterintuitively, that differential birth rates (for groups scoring high and low on a trait) do ''not'' necessarily produces changes in the population mean.}}</ref> | |||
| == In fiction == | == In fiction == | ||
Revision as of 12:49, 31 May 2022
Decrease in genetic traits deemed desirable Not to be confused with Dysgenesis (embryology). | This article needs attention from an expert in Biology. The specific problem is: Contemporary genetics research on the topic could be substantially unpacked. WikiProject Biology may be able to help recruit an expert. (January 2022) |
Dysgenics (also known as cacogenics) is the decrease in prevalence of traits deemed to be either socially desirable or well adapted to their environment due to selective pressure disfavoring the reproduction of those traits.
The adjective "dysgenic" is the antonym of "eugenic". In 1915 the term was used by David Starr Jordan to describe the supposed deleterious effects of modern warfare on group-level genetic fitness because of its tendency to kill physically healthy men while preserving the disabled at home. Similar concerns had been raised by early eugenicists and social Darwinists during the 19th century, and continued to play a role in scientific and public policy debates throughout the 20th century. More recent concerns about supposed dysgenic effects in human populations have been advanced by the controversial psychologist Richard Lynn, notably in his 1996 book Dysgenics: Genetic Deterioration in Modern Populations, which argued that a reduction in selection pressures and decreased infant mortality since the Industrial Revolution have resulted in an increased propagation of deleterious traits and genetic disorders. In popular culture, concerns about dysgenics have also formed the basis for speculative fiction, notably the 2006 film Idiocracy.
Despite these concerns, genetic studies have shown no evidence for dysgenic effects in human populations.
In fiction
Cyril M. Kornbluth's 1951 short story "The Marching Morons" is an example of dysgenic fiction, describing a man who accidentally ends up in the distant future and discovers that dysgenics has resulted in mass stupidity. Mike Judge's 2006 film Idiocracy has the same premise, with the main character the subject of a military hibernation experiment that goes awry, taking him 500 years into the future. While in "The Marching Morons", civilization is kept afloat by a small group of dedicated geniuses, in Idiocracy, voluntary childlessness among high-IQ couples leaves only automated systems to fill that role in
See also
- Devolution (biology)
- Flynn effect
- Heritability of IQ
- List of congenital disorders
- List of biological development disorders
Notes
- Rédei, George P. (2008). Encyclopedia of Genetics, Genomics, Proteomics, and Informatics, Volume 1. Springer. p. 572. ISBN 978-1-4020-6755-6.
- Jordan, David Starr (2003). War and the Breed: The Relation of War to the Downfall of Nations (Reprint ed.). Honolulu: University Press of the Pacific. ISBN 978-1-4102-0900-9.
- Carlson, Elof Axel (2001). The Unfit: A History of a Bad Idea. Cold Spring Harbor Laboratory Press. pp. 189–193. ISBN 9780879695873.
- Carlson, Elof Axel (2001). The Unfit: A History of a Bad Idea. Cold Spring Harbor Laboratory Press. ISBN 9780879695873.
- Richard Lynn: Dysgenics: genetic deterioration in modern populations Westport, Connecticut. : Praeger, 1996., ISBN 978-0-275-94917-4.
- Conley, Dalton; Laidley, Thomas; Belsky, Daniel W.; Fletcher, Jason M.; Boardman, Jason D.; Domingue, Benjamin W. (14 June 2016). "Assortative mating and differential fertility by phenotype and genotype across the 20th century". Proceedings of the National Academy of Sciences. 113:24 (24): 6647–6652. doi:10.1073/pnas.1523592113. PMC 4914190. PMID 27247411.
- Bratsberg, Bernt; Rogeberg, Ole (26 June 2018). "Flynn effect and its reversal are both environmentally caused". Proceedings of the National Academy of Sciences. 115:26 (26): 6674–6678. doi:10.1073/pnas.1718793115. PMC 6042097. PMID 29891660.
- Neisser, Ulric (1998). The Rising Curve: Long-Term Gains in IQ and Related Measures. American Psychological Association. pp. xiii–xiv. ISBN 978-1557985033.
There is no convincing evidence that any dysgenic trend exists. . . . It turns out, counterintuitively, that differential birth rates (for groups scoring high and low on a trait) do not necessarily produces changes in the population mean.
- Mitchell, Dan (2006-09-09). "Shying away from Degeneracy". The New York Times. Retrieved 2008-06-29.
Further reading
- Devlin, Bernie; Fienberg, Stephen E.; Resnick, Daniel P.; et al., eds. (1997). Intelligence, Genes, and Success: Scientists Respond to the Bell Curve. New York: Springer. ISBN 978-0-387-94986-4.
- Neisser, Ulric, ed. (1998). The Rising Curve: Long-Term Gains in IQ and Related Measures. APA Science Volume Series. Washington, DC: American Psychological Association. ISBN 978-1-55798-503-3.
- Beauchamp, Jonathan P. (11 July 2016). "Genetic evidence for natural selection in humans in the contemporary United States". Proceedings of the National Academy of Sciences. 113 (28): 7774–7779. doi:10.1073/pnas.1600398113. PMC 4948342. PMID 27402742.
- Barban et al. 2016, "Genome-wide analysis identifies 12 loci influencing human reproductive behavior"