These two things are correlated because they stem from a single factor called general intelligence. People have tried for decades to come up with different kind

These two things are correlated because they stem from a single factor called general intelligence. People have tried for decades to come up with different kinds of intelligences and it never holds up to scrutiny. So, yeah, the general predisposition to learn and generalize ideas seems to be a one dimensional thing. This article also seems to not be very attentive to the literature regarding intelligence. There is no threshold after which intelligence stops being beneficial to things like income and wealth. So we can confidently declare that the more intelligent someone is, the better the actions they take (at least the actions that lead them to acquire more resources). There are some ideas here that I think are worth investigating, though. The fact that smart people can hold confident opinions about very contentious topics (for example, republicans arguing that global warming is a scam) is a curious phenomenon. The interaction between intelligence and ideology can indeed be a very dangerous one.