Hey, questions/comments in Cradle of Man:
First, question - are you pushing a migration off the map, or just keeping it there?
Second, comment - not trying to bash; your culture's description is using stuff that already exists in the Maseroi A culture of the game; you can push for a bit more innovative than that. If you don't want to, you can also just take Maseroi A and push a population off the known parts of the map
EDIT: If you're trying to do a distinctive art style rather than development of art, that works.