I mean “unfit” in the sense of non-adaptability. A “fit” person adapts to changes. Is this a genetic trait? Nature or nurture? I think both, and that the culture of “the group” reinforces tendencies that are already there.
Notwithstanding all the silly movies that have been put out where an aristocrat marries a pauper and creates children that are good-old-just-like-me-and-you Americans, in general, upper-class British twits tend to marry other upper-class British twits. The lower-class people do likewise. Theodore Dalrymple, one of the best authors writing today, tells tales of these people that would curl your hair.
Different evolutionary variants? I can’t say, because, like everybody else on earth, I don’t know the mix of nature and nurture. Obviously, both play a part. But having observed my children’s and grandchildren’s classmates, I know that you can’t put a quart into a one pint container. What do we do with the one pint containers?
Having read the intervening posts between 30 and 36, I want to say that I believe that the poorest panhandler has a soul that is no more debased than the finest aristocrat. ALL have sinned and come short of the Glory of God.
My points are in reference to sociological and economic problems confronted by all societies.