# Dysgenics **Dysgenics** is the claim that a population's hereditary quality — nearly always operationalized as measured IQ — is declining because people with lower scores reproduce at higher rates than people with higher scores. It is the mirror image of [[Eugenics]]: where eugenics proposes improvement, dysgenics asserts decay already in progress. The word dates to 1915, when the Stanford president and eugenicist David Starr Jordan used it for the supposed damage of modern war, which killed the fit and spared the unfit at home; the worry itself is older, running from [[Francis Galton]]'s differential-fertility anxieties through the interwar sterilization campaigns to [[Richard Lynn]]'s *Dysgenics: Genetic Deterioration in Modern Populations* (1996) and the closing chapters of [[The Bell Curve]]. ## Why the idea persists Dysgenics is the **urgency generator** of the eugenic argument. A claim that traits are heritable implies no policy on its own; a claim that heritable quality is *actively deteriorating* implies that something must be done, and soon. That is why the thesis recurs at every stage of the tradition and why it surfaces today in [[Pronatalism]], in the "civilizational decline" register of the tech right, and in the [[TESCREAL]] bundle's fear of a dumber future. [[John Tanton]] endorsed it to Lynn directly in a May 21, 1997 letter; it is a load-bearing premise of [[Passive Eugenics]], and the "Idiocracy" meme (from the 2006 film) is its popular form. ## The empirical record The prediction has been tested for a century and has failed: - **The Flynn effect.** Measured IQ rose roughly three points a decade across the industrialized world through the twentieth century — the opposite of the dysgenic forecast. Ulric Neisser's APA volume *The Rising Curve* (1998) concluded there was "no convincing evidence that any dysgenic trend exists," and noted the counterintuitive point that differential birth rates do not necessarily move a population mean at all. - **The reversal is environmental too.** When Norwegian conscript scores began falling for cohorts born after 1975, Bratsberg and Rogeberg (PNAS, 2018) showed the decline occurred *within families* — between brothers — which rules out differential fertility across families as the cause. Both the rise and the fall are environmental. - **Genomic tests.** Direct studies of fertility by genotype across the twentieth century (Conley et al., PNAS 2016) find effects too small to produce the deterioration Lynn predicted. Reviewing Lynn's book, the demographer John Wilmoth wrote that its "most puzzling aspect" was that the predicted decline "has not occurred." The fertility–IQ correlations the thesis rests on are small, unstable across cohorts and confounded with education and income. The thesis survives because its function is motivational, not evidentiary: it converts a statistical claim about heritability into a story about decline, and decline is what the movement needs. ## Where it shows up now Lynn's data problems (national-IQ estimates built from tiny, non-representative samples) are the foundation of the "national IQ" tables that circulate in [[Human Biodiversity]] and [[Race Realism]] circles; the [[Pioneer Fund]] and [[Mankind Quarterly]] were the institutional carriers. In tech-right natalism the argument is inverted into an instruction — the cognitively gifted must breed — which is why the vault treats [[Pronatalism]] as the contemporary form of the eugenic project rather than a separate concern. See [[Scientific Racism]] and [[Social Darwinism]] for the surrounding lineage. ## See Also - [[Eugenics]] · [[Passive Eugenics]] · [[Scientific Racism]] · [[Social Darwinism]] - [[Richard Lynn]] · [[Francis Galton]] · [[The Bell Curve]] · [[Charles Murray]] - [[Human Biodiversity]] · [[Race Realism]] · [[Pronatalism]] · [[TESCREAL]] · [[John Tanton]]