What are you talking about? Black men are superior to white men in nearly every physical attribute. Generally speaking they're bigger, stronger, faster and are more suited to living in warm climates due to the melatonin in their skin so your statement could not be more wrong.
White people only came about because we travelled from the African plains to America and Europe and over time we did not need black skin any more because it was not as hot so our skin became lighter. There are of course other environmental factors at play such as dietary needs and vitamin D deficiency.
We're still evolving, even as we speak. Ever wondered what your wisdom teeth are for? Considering they just grow sideways in 95% of people and cause nothing but pain? Thousands of years ago when we ate roots and leaves we'd use these teeth to grind them up. Now we no longer use them so they no longer grow properly, eventually our bodies will just evolve to stop growing them all together.
What about your coccyx (tailbone)? Another completely useless non functioning body part, yet it would have certainly served us well when we were swinging around in trees, like a monkey. Since we no longer swing around in trees we've no need for a tail so the coccyx is the last remanence of our tails.
The appendix? I'll let you research this one. Hint hint, get it removed and nothing about your health or ability to digest food changes.
We evolved and are still evolving, stop being so ignorant.
P.S Adding to my point that beautifully illustrates evolution. The
Barbary Macaque monkey has almost no tail, why? Because it lives in mountainous regions where, who would have guessed it, there are barely any more trees for it to swing around in and thus no longer needs a tail.