Vitruvius
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In the previous thread about mapping WHG ancestry the topic got a bit derailed by topics concerning IQ and income of Southern Italians and Italian Americans. We established that Southern Italians seem to show an average IQ of 103 (D'Amico et. al 2012) which is comparable to the rest of Italy and most European populations. This contrasts sharply with the much less reputable PISA score IQ estimate of 92 given by Richard Lynn which was based on academic achievement. We also determined that the median household income of Americans who Identify as exclusively of Italian ethnic background is 90,000 USD, which places them significantly higher than the broad American median of 73,000 and the broad American white median of 77,000. The conversation has significantly diverged from the original thread topic so I figured it would be appropriate to make a separate thread. I'll leave us with @Jovialis 's last post to continue it.
I'm quite pleased to learn about that 2012 study refuting Lynn's work. I knew it was shotty, but tried to reconcile why it may be the case. At any rate, I was tested to have an IQ of 143 when I was 7 years old.
Furthermore, here in the north east of the US, Italians are typically living in nice neighborhoods, and towns, and have white-collar occupations. So an average IQ of 103 makes far more sense, than 92! Far more fitting for the descendants of Magna Graecia, which was home to people like Archimedes, Pythagoras, Parmenides, etc.
The United States and the economic system is closer to the state of nature, and allows more freedom to succeed (and to fail).
The USA has a much wider range of opportunity, and emphasizes entrepreneurialism.
Italy has stronger protection for workers, and thus more job security. But the US labor market is far more flexible, allowing for a less ridged system.
Furthermore, while Italy has a high-quality education system, it is not as closely linked to the job market, as it is in the USA.
Moreover, Italy has a much more robust social welfare system, while beneficial for people who really need it, it doesn't incentivize people to "pull themselves up from their own boot-straps".
Thus the stagnation of the South and the success of Southerners in the USA, demonstrates it is not a matter of IQ, but economic system and opportunities.