How big a selection pressure does higher IQ command?
Enough that Homo Sapiens has a brain volume nearly twice as high as Homo Habilis. (~600 cc to ~1200 cc).
I’m asking about selection today, or in the last few millenia, not two million years ago in a different species.
Today, as in the past ~40 years it has been negative.
Enough that Homo Sapiens has a brain volume nearly twice as high as Homo Habilis. (~600 cc to ~1200 cc).
I’m asking about selection today, or in the last few millenia, not two million years ago in a different species.
Today, as in the past ~40 years it has been negative.