Second, environmental factors account for 60% but that is broken down to 10% which cannot be adjusted (fetal environment, chance occurrences, etc.), 50% which can.
Third as I point out, and you concur, those factors cannot be completely changed. I estimate that we reduce the difference by a quarter to a half- which translates to 3-7 points, to 88-92. [the total difference is 25 points. Half of that is 12.5 points. 25-50% of that is 3-7 points, roughly]
These are rough estimates. You can easily adjust them to suit yourself. But anyway you cut it no more than 15% of blacks will have IQs above 110, almost none above 125, which is what's needed to work in the world of high-end jobs if merit is the measure.
That's a social disaster. Everyone will notice.
Sources: All this is pretty common knowledge and analysis. See, for example, “The Bell Curve”, or any reference on psychometrics.
Do you think Asians and Jews should be given preferential treatment because they are naturally smarter? Do you think we should continue to discriminate against Asians in the name of diversity as far as admissions to elite Universities? Or do you think we should abandon racial quotas altogether and go strictly by merit.
I embrace the last option.