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Cognitive sciences According to two demographers, who have studied the Swedish case, there is a strong correlation between intelligence quotient and fertility in the male population. In particular, Kolk and Barclay observe that compared to average individuals (IQ at 100), the group with the least intelligence (IQ < 76) has 0.56 fewer children, while the most cognitively advantaged (IQ > 126) have 0.09 more. Furthermore, men in the IQ range of 81 to 89 have 0.12 fewer children than the median group (IQ between 96 and 104), while men in the 111 to 119 range have 0.06 fewer children. more. By Peggy Sastre* Published on
ofa Darwinian point of view, it is a self-evident reality: if today we have a much larger and more complex brain than our ancestors or our primate cousins, it is because intelligence has made the difference. object of differential reproduction during our evolution. In other words, individuals with superior cognitive abilities reproduced better and therefore transmitted their genes more over generations than others. This link between intelligence and fertility will have been a question of primary importance for the social and biological sciences of the beginning of the 20th century.e century and even an almost obsessive subject for pioneers of behavioral genetics and modern statistics like Francis Galton, Karl Pearson and Ronald Fisher…
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