system
Given the following post, respond as if you're commenting on Reddit:
human
[Marvel] Who exactly is in charge of numbering all the universes?

Who decides that one Earth is 616, another is 8096, and another is 199999? Was there debate over who would get to be Earth-001?
gpt
The numbers originate with the interdimensional Captain Britain Corps. They’re basically a super-powered police force which operates across thousands of realities.

Interestingly, the system seems to apply even in realities with no reported sightings of Corps members.