Small communities can group together into clusters of communities that will cooperate, that will share common resources, and that will work out methods of interaction and resolution of disputes between them. But always it is from the bottom up, building from small units into bigger and bigger groupings. The bigger groupings get their power from the smaller groupings. Never does anyone assume control over a large region by social manipulation or politics and impose their will on everybody else there. The overall society is a cornucopia of different modes of expression and of living.
Diversity is celebrated.
Central to making it work would be new forms of economics. Rather than having centralized agencies assign value arbitrarily, based on manufacturing capability and real estate ownership, value is assigned more locally, by what people truly find to be of value. As part of that, the role of work changes. People will be likely to take on work that truly needs to be done, and that others closely around them find valuable. As compared with having jobs that pay well in money, but has little inherent value for the society.