How would you respond to Greg Clark?:
...Many commentators automatically assume that low intergenerational mobility rates represent a social tragedy. I do not understand this reflexive wailing and beating of breasts in response to the finding of slow mobility rates. The fact that the social competence of children is highly predictable once we know the status of their parents, grandparents and great-grandparents is not a threat to the American Way of Life and the ideals of the open society.
The children of earlier elites will not succeed because they are born with a silver spoon in their mouth, and an automatic ticket to the Ivy League. They will succeed because they have inherited the talent, energy, drive, and resilience to overcome the many obstacles they will face in life. Life is still a struggle for all who hope to have economic and social success. It is just that we can predict who will be likely to possess the necessary characteristics from their ancestry.
Quickly: I don't buy that individuals in all of these groups have an equal chance to reach their potential, whatever that might be. I do buy that the barriers that prevent an equal chance to realize potential have been present for a long, long time.