I agree that “being smarter” or above average intelligence helps with a whole host of stuff besides science and engineering, including business and social skil

I agree that “being smarter” or above average intelligence helps with a whole host of stuff besides science and engineering, including business and social skills, all other things being equal. My point above was regarding the difference between say 2SD above mean vs 4SD. It did not help much and perhaps hurt in a few ways, like getting bored more easily, to have a +4SD IQ in the past. Most businesses and jobs were not very complicated. So having a +2SD intelligence could be optimal in the past in most parts of the world. Work at today’s multinationals and globe-spanning empires, in many fields, benefit a lot more from +4SD intelligence and the stimulation from complexity helps mitigate some of the drawbacks. The optimal level for career success in many regions/careers might have shifted to +3SD or even +4SD instead.