Certainly, I think that social elements which limit mobility certainly would prevent those genes from moving up from the lower economic classes. But the amount of which that takes place would be difficult to determine. Certainly it’s not 100%.
Bear in mind here, I’m by no means suggesting that success is somehow entirely based upon genetics. That would be absurd. Merely that there must be SOME genetic component to it, which would further erode the notion that merit can be assumed to be evenly spread across the entire society.
I think your point here is interesting, that the inherent “stickiness” of economic position would create some effects on the overall distribution. Although it’s a little more complex than what you present here, because it would generally have a unidirectional effect on the edges of the economic ladder, and minimal effects on the middle.
That is, for the lower end of the economic ladder, the inherent difficulties presented to those people will dampen the effect of traits (both biological and behavioral) which would normally lead to success. However, it would also AMPLIFY the effects of traits which would lead to failure. On the opposite side of the economic spectrum, with really rich people, it would do the opposite, dampening the impact of negative traits, and amplifying positive ones. For the middle class, it likely be evenly spread, and probably the most purely meritocratic section of the population.
So for poor people, it’d be difficult to move up (although possible). But easy to continue to fail. For rich people, it’d be hard to fail, but if you have a good idea or something you’d have a chance to build it into something really great.
In terms of human behavior being conditioned by genetics, I believe that most higher level behavior is really not determined by your genes at all. But certain low level functions which affect that behavior are.
I am not a expert, but maybe the timeframe for evolution to play a role in genetics in a human society is too long. Like you would need a society to last from 10.000+ to 100.000+ to see evolution effects.
Then you have smart people having less childrens than poor uneducated people. Hell… some smart people choose to not have childrens at all.
What I am tryiing to say is that maybe this talk about genetics is not relevant or is too complex with unforeseen consequence’s.
I think it’d likely that evolution takes some slightly different forms with humans than with things like bateria. We have longer lifetimes, and in modern society people don’t necessarily DIE do to disadvantageous traits. But we also have, in addition to our pure genetic makeup, behavioral patterns which we transfer from one generation to another, and which are much more mutable.