What do you mean "it replicates worldwide"? What replication are you referring to?

IQ differences between ethnic/population groups/racial groups. It's not only a US phenomenon

I don't think it's a US phenomenon in particular; I'm saying we have data about the US, and not about the rest of the world.

Then you haven't looked

	▲	tptacek 8 hours ago \| parent [-]
		People tend to say this before citing "IQ and the Wealth of Nations" or something derived from it.