I’d like to hear the supposed average IQ in Equatorial Guinea being 83 explained.   Many countries in Africa reportedly have shockingly low average IQ’s- I would sure like to hear any possible causation for this.   I have heard the plague killed off a huge amount of the population in Europe with only the people wealthy enough to isolate living through it which seems to be one legitimate reason why the average iq is a little higher there.   I am curious to hear if there was some event that could cause the Africa situation.,(reply>), 83 isn't shockingly low, it's about 1 in 8 low,(reply>), The Black Death killed both the nobles and commoners, people only survived because of herd immunity, no one practiced isolation nor did anyone knew or believed it. So I don't think that's a scientific or legitimate reason for the higher IQ score. As for the <i>shockingly</i> low average IQ scores in Africa. I don't think one should look for causations because by default humans live by animal instincts and not by reasoning. If we test the IQ of the average people in Europe in Medieval times their scores would be <i>shockingly</i> low as well.