[quote=@Fisticuffs]
[@Roughdragon1] Just out of curiosity, do nations on Earth still exist? Or, rather, do the regions that nations once existed in still exist? Is Ireland still Ireland? Is the US still the US?
[/quote]

Good question. No, independent nations do not exist anymore. Instead, planets are essentially the new "nation", with large cities and districts that span hundreds of miles of land.