Identity is crucial part, but it's rooted even deeper. It may come from various features we consider identical with others. However it's really strong when it's rooted in values. In case of blockchain, we choose to use one chain or another, and these values are coded into blockchain itself. Tokenomics, distribution, governance, rate of inflation, it all speaks of values held by community. Unwritten rules of Hive are natural consequence of this architecture and ar inevitable for sustainability of community. Of course, people perceive these values individually, and this percetion may vary, but it's similar enough to create identity around it. That's how I feel it. Meeting other Hivers IRL was a breakthrough for me, I instantly knew we have something in common, and it only deepened after talking to people more.

Another aspect on top of common values is alignment of incentives, it's beneficial for all parties involved to cooperate within that state. And at the same time nobody is being coerced into doing anything. And within certain Overton window (its inevitable IMO, what's crucial is making it wider than elsewhere) everybody is free to hold and express any opinion.

Also what I mean in my post, it doesn't need to be solidified in any form of official body, it happens by itself thanks to proper infrastruture provided. The most important part is to aknowledge the process and use the narrative for the benefit of the community. The whole process might take decades to fully unfold.