You seem to be intentionally diluting the terms. The origins of this discussion trace back to BSA's 1995 report on intelligence https://en.m.wikipedia.org/wiki/Intelligence:_Knowns_and_Unk... and that report is caused by some research work done by Herrnstein & Murray, results of which were published in a book https://en.m.wikipedia.org/wiki/The_Bell_Curve

What the research addressed was the IQ bell curves among various groups. What the research didn't address was correlation between IQ scores, intelligence, and general life satisfaction, difference between "academic smarts" and "street smarts", presence of various impurities among the ethnic groups, etc.