I'm sorry, I'd love to help but I'm not sure I understand exactly what you're asking. It's hard to answer the question why communities didn't adopt certain forms of organisation, especially in a period for which we have no narrative histories. Are you asking why the city-state did not emerge sooner? Or how Bronze Age lords managed to dominate their communities? Or why the city-state as a common Greek form of political organisation only arose when it did, centuries after the Bronze Age?

I should point out that the concept of the "city-state" is very muddled and confusing, and some scholars no longer use it to describe the polities of the Greek world, since it hurts more than it helps. I wrote about the problems with the term here. Also, in all periods of its history, Greece saw many different kinds of state organisation, some of which I've outlined here; both kingdoms and tribal groups existed in Greece in what we consider to be the age of the city-state. I hope these posts can help answer some of your questions.