Answer:
I think it's because a lot of people couldn't move over there because they probably didn't have strong enough boats, and the land bridges that use to be there broke off. So only a certain amount of people could be there. That's why Native's are native because they were there first. (Also other groups like the Maya's and Aztecs)
Explanation:
Basically people weren't able to Really get over there easily. Also communication was cut off (that's why some languages have similar words while others dont)
- Now I'm thinking about it and I really don't think this helps to much but use your brain! There are many things that could force civilization to not gather in cities.
Sorry about this????
