> To assume that once we reached this point, human cognition stopped evolving would be more elective than attempting to explore hypothetical situations as appli

> To assume that once we reached this point, human cognition stopped evolving would be more elective than attempting to explore hypothetical situations as applied to our understandings of past peoples to help analyze the question. Evolution doesn't work that way. My criticism was with your assumption that such selection would differ markedly between populations. Also, IQ is not a suitable proxy for intelligence, if you want to make the conclusions you're making. It's an aggregate metric that takes into account things that aren't intelligence (e.g. certain aspects of culture); how do you know you're not detecting heritability of those? Any study that starts at IQ and ends with new conclusions about intelligence is probably wrong.