Quote Originally Posted by Philipvs Vallindervs Calicvla View Post
One example, and one known to be influenced by parental expectations; it isn't widely suggestive even. On the other hand, sickle-cell is almost exclusively an African condition, for obvious reasons, to the extent that the condition in a European usually indicates African ancestry.

So Environment is not "the" factor.
But PVC. One might as well say that people with African ancestry have darker skin. This is what we are talking about:

Is it then so far fetched to assume that the difference doesn't stop at the physical attributes, but that there also exist cognitive differences?
Right? It's about assuming cognitive differences. I think it is usual to assume no difference until one is shown.