> Everyone would have their citizenship passport ID and their UN ID, and the latter could serve as a "break glass" master key to support immigration Immigratio

> Everyone would have their citizenship passport ID and their UN ID, and the latter could serve as a "break glass" master key to support immigration Immigration doesn’t work that way. You don’t lose or transition from one identity federation to another. You maintain both, typically for the rest of your life. My personal wishlist is that decision makers and designers of identity systems must include people with real world experience of multiple nationalities, tax residencies, migration and so on. Currently, these systems are already built on false premises and immigrants suffer a lot – not only because of malice but to a large extent because the bureaucrats didn’t think like security-minded engineers. The edge cases are extremely important when it comes to identity, because identity is required for a lot of basic needs. As the world is become more globalized, these issues are a lot more prevalent. > and I think most of why it's hard is human rather than technical Yes but I don’t see why that’s so surprising. It’s the identity of humans that’s the problem. FWIW I think email is fantastic as identity, compared to the abysmal state of the alternatives. It doesn’t change when you cross a border like phone numbers. It’s not perfect when it comes to self-sovereignty and account recovery.