I guess there really are a spectrum of the graph if you plot: intelligence-VS-nice-guy-rating. I was lucky enough to work with some 'really really clever peopl

I guess there really are a spectrum of the graph if you plot: intelligence-VS-nice-guy-rating. I was lucky enough to work with some 'really really clever people (math+physics+cs)' in my career. Bar one or two generally the nicer they were the higher their intelligence seems to be at least from my point of view. The reverse were also true. I've also had the misfortune to work with some really 'difficult individuals' and you can spot their lack of basic knowledge + intelligence from a mile away. Maybe it's an evolution thing ? The "dumber" you are... the more you need to be aggressive (I.e Caveman: No charm, but I got a club to seduce females + competitors) to have your genes continue. Versus if you clever, you don't need all that aggression, you can finder clever ways to "woo" the women to carry on your genes :) ?