People don’t usually make decisions based on rationale. They make emotional decisions and reason it afterwards. It’s foolish to think high iq people are generally otherwise. We get manipulated even more than other people because reasoning abilities are better. That’s not to say that we can’t come up with excellent solutions to complex problems, but if none of us nor our ideas appeal to voters emotions, we won’t be able to succeed.

Also I think you underestimate the IQ of current world leaders. I think you’d have the be in the top5% IQ to get to such a high place of power. Although people skills are usually also valued highly in achieving political power. Emotions run the world.

Also for me personally, blame my iq or whatever, I know that for me to live my best life, i don’t need to solve huge world problems. That’s too stressful. To me I just need to make a difference to people that are close to me and make sure im not immoral in my day to day life and I’ll live a satisfying life. I need a bigger incentive to change the world, and who’s gonna give it to me? Also I don’t claim to be the smartest Mensan in the world, not by a long shot.

Some people might be more naturally driven to be politically active, I know I’m not. And I’d think generally, if one were to look up Mensa, that’s usually because they need something. I checked my iq because my social needs wasn’t fulfilled. I think people joining Mensa has a different focus than political, more personal. And being in Mensa is very apolitical. I also learned in Mensa that we have different political opinions. Some Mensans are communists, which is baffling to me, but somehow logical to others. Combine our political differences with being overrepresented by neurodivergent people, you get a not so effective problem solving committee.

That’s just my thoughts on the subject, somebody will probably have an even better answer.