Tech Execs Are Pushing to Build 'Freedom Cities' Run by Corporations
gizmodo.com
gizmodo.com
All those except their own.
The old concept of the city state or polis [0] helps somewhat in understanding this model of granularity.
From my ignorant reading of classics, they're basically never at peace with each other for long.
[0] https://en.wikipedia.org/wiki/List_of_ancient_Greek_cities