So far, I have created a natural world, and I'm starting to think about putting a history of human interactions in it. First I'm going to start with the early history. That includes early migration, which lays down the foundation of future history, but I don't know how to structure it properly. Here is an example of what I want it to look like.
Here is mine.
The base question is:
How do I structure the migration paths?
1:Do I make them go everywhere that they can get to?
2:Make them walk forever until they find a good area?
3:Force then to split up every once in a while?