What genetic predispositions do the various peoples have in your opinion?

[manu15151513]

Southern Italians, for example, are genetically more predisposed than northern Italians to what behavioral attitudes? For what evolutionary reasons? Discuss.

[Voskos]

How can such a predisposition be proven?

[manu15151513]

How can such a predisposition be proven?

I believe it is possible to conduct twin studies with nationally representative samples in my case.