This article is extremely helpful in setting the condtiotins for Gardenworld

David Wengrow

a few quotes.

In fact, surprisingly few early cities show signs of authoritarian rule. There is no evidence for the existence of monarchy in the first urban centres of the Middle East or South Asia, which date back to the fourth and early third millennia BCE; and even after the inception of kingship in Mesopotamia, written sources tell us that power in cities remained in the hands of self-governing councils and popular assemblies.

and

Instead we find circular arrangements of houses, each with its attached garden, forming neighbourhoods around assembly halls; an urban pattern of life, built and maintained from the bottom-up, which lasted in this form for over eight centuries