Comment by lutralutra on Why so much variance in human intelligence? · 2019-09-11T21:23:29.734Z · LW · GW

You have to struggle to survive even harder in hotter temperatures or at least that is how I feel. Nowadays, I associate higher temperatures with an invitation to leisure and laziness somehow. Also it happnes that the countries along the Equator are somewhat less developed or have been dealing with political, climate, economical and health issues most of their existence.