Cities are certainly not the norm when looking at "~all of human civilization.". The norm by far is small anarchic-communal villages (150 people or less). Yes

Cities are certainly not the norm when looking at "~all of human civilization.". The norm by far is small anarchic-communal villages (150 people or less). Yes, eventually some outliers form, and villages become a large metropolis, with all of the problems and certain pitfalls that entails.