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Is there any serious analysis of whether Germanic settlement in Northern Italy in 500 to 700s is one of the major reasons why northern Italy dominates the south? How large was the genetic impact? Can we run admixture studies? https://en.wikipedia.org/wiki/Lombards pic.twitter.com/yl3mGd3an4
Maybe Lynn got it wrong. He mainly proposes that Southern Italians mixed with Northafricans and got some lower IQ admixture, but maybe it's the other way around: the North Italians mixed with the Germanic invaders and that's how they got their genetic advantage.
The Roman name for Northern Italy was Cisalpine Gaul because it was populated by Celtic tribes during 1st millenium BC from Switzerland and NW France. South was Magna Graecia. The Medieval Germanics added NW Euro DNA to North/Central, and North Africans added MENA DNA to South
North italians are north italians. The germanic elites didn't seem to gave changed the gene pool. South italians and sicilians had some weird admixture since the bronze age.
The Lombards and Goths that settled there were 10-20% of the north Italian population. I agree that the N-S differences are mostly due to pre-Roman times though, with Indoeuropeans (Italic tribes) replacing proto-Sardinians in the north but not so much in the south
Watch out for @nntaleb
Southern Italians have effectively zero mixture with North Africans. If anything, it's the other way around. By the late Roman Empire, it's estimated 20-30% of the population of the North African provinces was Italian, and that population remained and mixed with the natives
Look prof. Just give it to us straight. Does Africa start at Rome? Are southern Italians even white? We need to know.
Genetic advantage?
Whilst Italians were creating the greatest marvels the world has ever seen, Germanic tribes were squabbling in the dirt and sacrificing their own children 
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