To start getting ideas about your first and last sentence and the questions--implicit or not--therein, take a listen to the 2 resources i have listed in the first comment to Trivium's note. To best comprehend things, listen to the read of Liminal's article titled "Understanding Knowledge" FIRST (this is actually the second link listed in my orginal comment). Or you can read the article. [Should all be there in the shownotes.]Things will make more sense that way. You will have that grounding when you listen to Liminal's interview with "Bitcoin and..." podcast host David Bennett. (First link in my comments.) You will start getting an idea about what Nostr is about, what it is already doing, how diverse it is, and also what it could be, evolution!