Thanks for the thoughtful interaction. Conversations like these are why I love nostr.
The point on literacy is so important. I think one of the major points of decentralization in history was that of the commercialization of the printing press. It seems after the printing press there was radical decentralization (Reformation + 30 years wars) and then some return to something more centralized, but not quite as centralized as before. So that the overall trend of history (at least the last 500 years in the west) is toward decentralization with corrections toward centralization.
Have you read Niall Ferguson's, "The Square and the Tower"? I read it 5+ years ago and it helped me start thinking about this issue from a historical point of view.
