> My layman's prediction is we will be able to measure IQ in the future by some means of scanning the brain's process of building connections and nerves.
There's some interesting imaging research over the past decade or two suggesting that if you want to reify IQ as something physical, it might wind up being something along the lines of global connectivity - how well and efficiently distant brain regions can communicate and coordinate activities.
Creativity is so hard to quantify or even describe that I don't think anyone can say anything meaningful about what it's useful for or what its relationship to evolution might be.
There's some interesting imaging research over the past decade or two suggesting that if you want to reify IQ as something physical, it might wind up being something along the lines of global connectivity - how well and efficiently distant brain regions can communicate and coordinate activities.