I think we want an institution in the broad sense of a set of wisely understood and adhered practices, rather than a formal institution like a global central bank / ICU. 1/
We still need to engender a degree of international buy-in and consensus. But the norms agreed can be enforced in a decentralized and competitive manner, while a formal institution is fragile to leadership takeover, would be too risky in so conflictual a world, I fear. 2/