[quote=@VitaVitaAR]
I think we should have multiple human civilizations. Because I like the standard "medieval western European" thing, but it also means we can have other ones.
[/quote]

But that makes humans too vague and everywhere. As illogical from a historical viewpoint as it would be to have one human realm, it at least pins them to having a specific role in the world rather than 'be everything'.