alright, so I'll drop part of the map, the relevant part anyway, a map of the cultures and more or less the political entity on it, I don't have set names for those yet, but I have visual theme, and from left to right it goes:

Mesoamerican/Mayan/Aztec,
Inca/Moche, Egyptian/Tamil/Indian and last South East Asian/Khmer/Thai

and then some lesser civilizations that are not recognized by those four as proper civilizations are shown on the map by their borders but not highlighted