The really interesting thing is that you see results from all over the world showing this. Catholics in Northern Ireland in the 1970s measuring 15 points lower than Protestants. Burakumin in Japan measuring 15 points lower than non-Burakumin. SAME GENE POOL. This strongly suggests you get at least 15 points really easily just from social factors, and these studies may (because a study isn’t solid science yet, not even a string of studies from the same group) point to one reason.
The really interesting thing is that you see results from all over the world showing this. Catholics in Northern Ireland in the 1970s measuring 15 points lower than Protestants. Burakumin in Japan measuring 15 points lower than non-Burakumin. SAME GENE POOL. This strongly suggests you get at least 15 points really easily just from social factors, and these studies may (because a study isn’t solid science yet, not even a string of studies from the same group) point to one reason.
Could be interesting to know how much of that is the status directly, and how much is better nutrition and medical care.
That’s not obvious. Remember, there were strong taboos against interbreeding with Burakumin in Japan.
They separated only a few hundred years ago.