"Environmental circumstances could possibly lower the IQ of a person"
Absolutely. It goes both ways. Being forced to adapt to survive vs staying in the same sedentary lifestyle in an area with abundance tends to weed out the less intelligent. You could even argue that it's not about lowering the IQ, it's about failing to raise it through evolution.
"Environmental circumstances could possibly lower the IQ of a person"
Absolutely. It goes both ways. Being forced to adapt to survive vs staying in the same sedentary lifestyle in an area with abundance tends to weed out the less intelligent. You could even argue that it's not about lowering the IQ, it's about failing to raise it through evolution.
Guy, intelligence isn't the only viable survival strategy.
Jellyfish are doing just great, thanks.
Environmental pressure could just as easily select for, say, athletic ability rather than cognitive ability.