My four international examples of social sorting deal with the issue of leaders and entrepreneurs in a society.
These people can be killed as they were in the USSR and China, or they can be driven out deliberately as in the case of the two waves of outcasts from Cuba. First, three years after the revolution, in 1962 when property was confiscated, all potential anti-Castro leaders and entrepreneurs fled Cuba. Then again twenty years later when the gates to leave were opened a new generation of leaders and entrepreneurs left the country.
The USSR, China and Cuba succeeded in eliminating dissent and commerce by involuntary social sorting.
Sort to eliminate leaders and entrepreneurs and you get a bland nearly rebellion-commerce free society.
The case were social sorting occurred without a deliberate government decision was in the Palestinian territories. Over a period of 25 years from 1968 to 1993 the Palestinians with leadership skill and business skills left the country; there was no political stability and efforts by the PLO outside the country were always toward instability. When Adolph Arafat arrived to run the country in 1993 a few business people returned but quickly learned that his corrupt government was no place for them.
As a result there are virtually no competent people, no business people and few leaders in Gaza or the West Bank.