Once in a Blue Moon Academia (OBMA)’s Constitution does not found a state, church, company, political party, NGO or university; it binds a self-regulating commons of inquiry and action to the Earthian Charter and turns that Charter into praxis. It names OBMA as Earthlings among other-than-human life, seated in Baranagar on the Ganga but organised by watershed rather than nation, and it sets two inseparable goals: to expose the failing world economy and to act from the fact of ecological collapse. Fifteen Charter commitments become binding duties—Earth first; food, cloth and shelter instead of “growth”; decentralised power; refusal of extractive wealth; a moneyless commons; occupation of speculative finance; partyless communes; irreligious public form; deschooling beyond academiocracy; community health and justice; law that vanishes toward self-rule; no veto; no chase for office; total disarmament—while care, emancipatory praxis, equity and mutual aid are guaranteed to all who take part. Power stays small, open and reversible: an Assembly and circles, recallable stewards, no founder’s chair, an open ledger and a funding screen that rejects coal, arms, big finance and branded philanthropy. Knowledge is copyleft and fee-less; learning returns to place as a non-school; harm is recorded and defended, including the memory of financial fraud; capture is treated as the main danger, and the commons may dissolve rather than become a brand.