Doesn't civilization just literally mean a system of living together in a city? There doesn't need to be any written record of how they did it does there, just evidence that they did?
What counts as a city? Anyway, we're talking about a concept involving family resemblances rather than an airtight set of sufficient-and-necessary conditions.
Urbanization is one qualifier but not the only one. Plus even today we could have such chaos in a town where laws are absent and justice is that dispensed by the strongman/woman warlord and that would hardly be considered civilization.
Uncivilized does not mean stupid or brutes.
> Doesn't civilization just literally mean a system of living together in a city?
The classic checklist definition is: cities, writing, centralized state, agriculture, social stratification with rulers.