I saw @ledlecreeper27@lemmygrad.ml 's post and wound up making a larger version of it (with my own changes)
Update- wound up making a expanded version
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and a notion of how it would look amidst a better world (not overly serious, borders subject to change)
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Who says they have to be libertarian? It would be better yet to have them as UN mandates, but specifically "international cities" that can get flooded with immigrants from the global south.