Libertarianism

I don't pay a lot of attention to business beyond general economics, but there are a few successful investors I'm reasonably familiar with through their written works, personal correspondence, and several dozen hours of interviews and speaking engagements: Douglas Casey (Casey Research), Jim Rogers, and the late Harry Browne.

All three of these are interested in philosophy and Austrian economics, which right away makes them more interesting than most academics IMO. Casey and Browne are both fans of my favorite German philosopher, Max Stirner, who isn't exactly well known outside of select anarchist circles. I have heard all three of them speak extemporaneous, and at length, on a large number of subjects ranging from monetary and foreign policy to the fall of Western civilization. Their comments show a familiarity with what many others have said related to these topics, as well as an ability to synthesize and generate novel answers. This is perhaps most impressive in the case of Douglas Casey, who is sloshed half of the time he's interviewed (when you have enough money you can do whatever you want, I suppose).

I am not a human IQ test but based on my experience with normies, midwits and unstable genius types I would easily put all three of these men in the 130+ IQ range without any reference to their financial success. Even if you thought these were pure luck that's irrelevant to the fact that these are clearly highly intelligent men. I seriously doubt that more than 25% of academics are actually more intelligent than them.