Found this 2019 Nostr white paper from Fiatjaf, its founder.
It is incredibly well written.
It follows the classical evidence-based blockchain approach: PICO
P = What is the Problem?
C = Comparison (existing solutions)
I = Intervention (Nostr)
O = Outcome (How will the new solution achieve better outcomes than existing solutions)
The text is easy to understand, explains why the world needs Nostr, and how it works (for even non-tech people).
The writing style shows all great inventors and innovators have one thing in common: They have a crystal clear vision of what they want, and how to get there.
(Writing style reminds me of Steve Jobs or Satoshi Nakamoto).