Themselves they work for the rich people and the barbarians the rich people
Historically, they burned the people infected with it(to death if not already dead)
The type of society which didn't have a centralized government was called a Pastoral society. So that is your correct answer.
All the other civilizations/societies - the Egyptian one, the Mycenaeans, and the Indus valley civilization - had governments which were centralized and not dispersed to different locations.
