As far as I know, intelligence is (like everything else) almost entirely genetic

As far as I know, intelligence is (like everything else) almost entirely genetic. It’s early development biased. It’s controlled by a large number of REGULATORY rather than small number of protein-producing genes. The difference is purely neuronal. Of the neuronal difference its largely hippocampal and frontal. So a lot of things must go right for exceptional intelligence, and anything can go wrong.

As far as I know nothing else is required of the paleolithic revolution (cognitively modern humans) other than an increase in IQ from the 50-60 (childlike but dangerous) range to the 70-80 range (unpleastant and hostile) to the 80-100 range (most of humanity), to the 100+ range (the people that make abstractions).

As far as I know, the difference will not appear in changes in morphology.

As far as I know cranial volume does appear in morphology and IQ.

As far as I know just like spine and brain volume, developmental IQ is the resut of selection for neoteny (slowing development).

As far as I know the races reproducte, mature, and have gestation rates that reflect this.

As far as I know aboriginals isolated after the ice age increase in water levels have mid 60IQ’s

As far as I know IQ roughtly translates to latitude – but I can’t yet determine if this is an agrarhian or pre-agrarian manifestation.

As far as I know everyone woud have just GUESSED this prior to the second world war, and pseudoscience has tried desprately to suppress the obvious that science is not confirming.