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We have gotten taller during that time period, why is not feasible that IQ scores increased as well?
"Skeletons and written records show that human beings today are inches taller than humans just a century or two ago."
We have gotten taller primarily because of better nutrition. IQ scores have also increased because of environmental factors. The problem is that people are trying to pretend that IQ scores are some kind of genetic measure for intelligence, which is without merit.