The highest form of civilization
The highest forms of civilization of the modern day are in engineering, of basic services.
Zoning and scheme, Housing, Commerce and Transport.
The leper is cast away from a system of overlords and socialism, and its community rules and enforcement. He is refused service by a controller, a manager, a driver, a landlord and he is refused service by society, all reject. The only system that gives the leper safety and asylum is the system of private property.
A leper can sleep in a bed and the leper can drive in their car.
Therefore private property is the highest form of civilization.