Don’t people have basically the same IQ’s everywhere?
No.
No -- you could read Richard Lynn.
No, but IQ is not entirely rigid.
In the United States there has been an steady increase in the average in the 20th century.
Blacks tend to score below average, while Asians above average. The Bell Curve mentions this and talking about it elicits a lot of racism accusations.
Ashkenazi Jews
East Asians
Asians
Whites
Or Whites may switch with Asians above.
Routinely test as most intelligent
Highest/lowest countries’ intelligence measures
http://www.statisticbrain.com/countries-with-the-highest-lowest-average-iq/
“(intelligence quotient tests) have shown a large measurement of differences between racial groups. Average scores of Blacks being lower than Asian Americans which score higher than Whites. While gaps in IQ scores between races is well documented there is not much agreement among researchers for why that is.”
https://socialtaboos.wordpress.com/2011/09/29/race-iq-test/
In much of Africa, it can be argued that from the burden of intestinal parasites and malaria, the nutrients literally consumed by pathogens hurt brain development across the board - causing 10-20 point reductions in AVERAGE IQ.
In much of the Middle East, where over half the population marries a paternal cousin, inbreeding depression lowers overall IQ, plus malnutrition for girls because the food is preferentially given to boys.
In the parts of Asia where malnutrition is bad enough to have several million kids go blind from lack of vitamin A, insufficient micronutrients and protein also crimps brain development.
It is estimated that if everyone got a good multivitamin, sufficient iodine, anti-malaria drugs and deworming every month, the average IQ in much of Africa and Asia would go up 10-15 points.
Whether this is enough to raise the African IQ to the Western average isn’t certain, but it would certainly close the gap.
But no amount of schooling will turn a kid left brain damaged by five bouts of malaria into a genius.