Most of the societal or political problems of the world are a medical problem: how do you treat IQ deficiency. You solve that, you revolutionize politics, ethics, demographics, etc.

It would be interesting if a new class of drugs was developed that had some of the effects people seek, so they maintained their allure to those who find them alluring, but also amplified impulse control instead of diminishing it. No doubt non-users would complain about users getting a benefit they didn't earn (e.g. the prodigal son's brother), and there are no doubt other consequences I haven't thought of.

Agreed. (At a personal level I have become a hermit of sorts, seeking out the above average people and choosing to deal with the select few)