"The Chinese Communist Revolution consolidated its power by taking land
from the elite. In the following generation, the previous elite once
again reclaimed their social advantage.
This is not an isolated phenomenon...
The Cultural Revolution is one of the most extreme efforts of wealth equalization in all of human history, over 43% of all land assets were transferred to others. The goal was explicit: to eliminate income and wealth differences between the rich and poor in perpetuity.
The communists failed. Despite the initial and massive changes (land reform was one of the causes of the Great Famine), the elite regained their foothold. The extreme egalitarian conditions eased, and university admissions went back to being merit-based.
So too did income differences re-emerge. They earned more than their past forced equals and even edged out the earnings of party members!
As a group, they were many times more likey to be highly educated.
In effect, many of these families had the vast majority of their wealth erased.
There was significantly less homeownership. However, this was recovered within a decade!
Stepmothers might have a small effect...
When there is no genetic relation there is no resemblance in academic outcomes.