Linux

local communities managing themselves (something like city states maybe?) and their relations to other communities

Your describing a Soviet you filthy commie.

But for real what your describing is communism as marx originally thought of it. The one example marx gave as a model for what communism would be was the Paris commune which adheres to a lot of what you said. Most leftist agree that that's the end goal it's just a matter of how to get there. Lenin originally pitched the Soviet Union as just that, a bunch of local councils(soviets) freely cooperating and making there own rules. He saw how the Paris commune's openness and military indecisiveness led to it being brutally suppressed though and wanted an interim top down dictatorship and rapid brutal industrialization to handle this threat. The threat never went away though, first with the Nazis almost annihilating them then the u.s. pointing nukes at them, so neither did the dictatorship.

Their end goal was still avowedly the same though, and communism, to me at least, is about that goal. Their are a bunch of different theoretical paths to it, and there's tonnes of infighting as to which ones the best, but all communists agree that the commune/Soviet/city state should have all the power.