IQ is part of a large “nexus” of positively correlated societal outcomes. IQ correlates positively with family income, socioeconomic status, school and occupational performance, military training assignments, law-abidingness, healthful habits, illness, and morality. In contrast, IQ is negatively correlated with welfare, psychopathology, crime, inattentiveness, boredom, delinquency, and poverty. The correlations exist. What remains far more ambiguous, in my view, is the interpretation of these correlations.
Tellingly, all of these outcomes are also correlated with one another, forming a large interconnected web of positively related variables. For instance, income is not only positively correlated with IQ, but is also positively correlated with amount of schooling, parental income, and parental social status— all of which are individually also positively correlated with IQ. This makes it extremely difficult to disentangle all these variables from each other to figure out what’s causing what.
https://blogs.scientificamerican.com/beautiful-minds/iq-and-society/
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