As off reserve native friends of mine have said, they live today as they did 1000, 2000, 5000 years ago, with the same social systems of chiefs and families, and culture norms of violence and rough justice.  Just as  Chinese, Asian , or even WASP  communities wind up looking alike wherever they settle,   what you see on reserves is just how it's always been  but with trucks, pizza, TV, and blue jeans