https://en.wikipedia.org/wiki/Fertility_and_intelligence https://en.wikipedia.org/wiki/Fertility_and_intelligence > There is evidence that, on a population lev

https://en.wikipedia.org/wiki/Fertility_and_intelligence https://en.wikipedia.org/wiki/Fertility_and_intelligence > There is evidence that, on a population level, intelligence is negatively correlated with fertility rate and positively correlated with survival rate of offspring.[1] It is postulated that, if the inverse correlation of IQ with fertility rate is stronger than the correlation of IQ with survival rate, and if the correlation between IQ and fertility can be linked to genetic factors, then the hereditary component of IQ will decrease with every new generation, eventually giving rise to a 'reversed Flynn effect', as has been observed in Norway, Denmark, Australia, Britain, the Netherlands, Sweden, Finland, France and German-speaking countries, where a slow decline in average IQ scores has been noted since the 1990s