You are discounting the potential for intelligence AC.
So you are really going to say that evolution can cause pigmentation change, height differences, eye color/shape differences, fast-twitch muscle response differences but the possibility of evolution occurring above the neck is impossible.
Why do you keep saying social darwinism when I say evolution. I never pegged you for the Adam and Eve origin type. I'm not going to judge you if you don't believe in evolution, but there's quite a bit of proof you may want to look into.
I am an atheist and I have spent years of my life devouring books and college courses about evolution and anthropology. So you know where I am coming from, when I say social darwinism has been thoroughly disproved, I mean "survival of the fittest" is an inapt description of natural selection. Mutual aid is an equal factor as competition in natural selection. I'm talking about evolution. Environment also plays a part in evolution.
Now take this understanding over to genetics. You are naming a bunch of
phenotypical traits and saying they have evolved and that it stands to reason therefore that intelligence should also. Every single phenotypical trait you mentioned, and intelligence can all be found in the people of every continent. However, some phenotypical traits are advantageous and those traits will therefore be more likely to be expressed (this is called epigenetics) and obviously over time those traits will be more likely to be 'selected' as it were. Over time this process will lead to a population having certain phenotypical traits.
If you took several hundred people from Africa and put them in the Alaskan wilderness, they would look phenotypically over time if they survive. Likewise if you took several hundred Norwegians and put them on a tropical island. You have to use large gene pools.
That principal is true with cannabis also, if you want to design a strain, you take a landrace you like and start with at least several hundred seeds and selectively breed them over a few generations into something homogenous. That is unnatural selection, but the principal is applicable.
The fact is, all of the phenotypes exist on all the continents, in all of the populations.