It has today been demonstrated that there is no charactaristic shared by any group of individuals which is diagnostic of that group.
Further, Darwin, although enlightened for that time - he was an opponent of both slavery and vivisection, and opposed rhe social darwinism that others read into his theories for example - would by today's standard be considered a reactionary. Things pass and things change.
In any case, the opinions of Darwin are irrelevant. What is important is his theory.