NEOTENY AND CRANIAL VOLUME Decreasing Returns On Increase in Cranial Volume: AFA

NEOTENY AND CRANIAL VOLUME
Decreasing Returns On Increase in Cranial Volume:
AFAIK, yes, intelligence appears to correlate with cranial volume, but there is also a declining return on cranial volume. So were our ancestors smarter than we are? Or is it that we traded volume for agency, and we’re less aggressive than they are?

I said appears. It’s just consistent with everything we know. 😉

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This is a napkin sketch. It’s bad data and bad math so don’t use it for anything.
Chimp:400@24 – Black:1267@75 =867@51pt= 43*20:17
African:1267@75 – White1347@100 = 80@25pt = 4*20:3.2
SEurasian:(???)@85 – European:1347@100 =??@15pt=?*?
European:1347@100 – Asian:1364@105 = 20@5pt=1*20:4
Roughly 4 IQ/cm.