Was anyone IQ testing their populations for academic research before AC existed, though?
I'm skeptical of the IQ heat idea - it'd be readily demonstrable if it existed - but the numbers available, particularly outside the US/Europe, are largely current/recent, not from pre-1950s.
I'm skeptical of the IQ heat idea - it'd be readily demonstrable if it existed - but the numbers available, particularly outside the US/Europe, are largely current/recent, not from pre-1950s.