I am sorry, but your argument is absurd Martin.
Not only do you not back up your claim regional areas have higher levels of incest that relate in birth, thus producing a higher level of the offspring resulting from inbreeding within the population; you have not presented any evidence suggesting such individuals would have lower levels of intelligence. You also seem to be attempting to suggest that it is only because of this supposedly higher levels of incest that many of them would likely have difficulty with tertiary education, ignoring the fact that the vast majority of them are not the result of inbreeding, yet would still have similar levels of intelligence and similar difficulty with tertiary education - which arises because of their lack of primary education, not some supposedly incestuous ancestry. ((And of course I am ignoring your spurious and completely unsupported claim about the wheel, which was due more to the fact that all humans were stupid back then on account of our underdeveloped brains, not due to whom they chose to sleep with))