Not quite what you were asking, but the first thing that popped into my head are "dispute resolution organizations" which come from Libertarianism and other sch

Not quite what you were asking, but the first thing that popped into my head are "dispute resolution organizations" which come from Libertarianism and other schools of thought. Might be an interesting avenue of reading if you want to learn more about inter-actor relations and contracts in the absence of centralized control.