Later, we see the same logic in the Ancient world, whose dominant political form (the state) would not have been possible without the expulsion (political dispossession) of a large body of Barbarian slaves kidnapped from the mountains of the Middle East and Mediterranean and used as workers, soldiers, and servants so that a growing ruling class could live in luxury.
The social conditions for the expansion of a growing political order (including warfare, colonialism, and massive public works) were precisely the expulsion of a population of Barbarians who had to be depoliticized at the same time.
This occurs again and again throughout history. Each time, the regime of motion changes as does the figure of the migrant.