Okay, I'm not going to try to explain how this would occur, because I want to more ask what this would be like. What if the Native Americans beat off the Europeans, and were able to become autonomous, while trading technology with them?
Could we see a modern USA that is much more environmentally aware? One that isn't capitalist, or at least one with much more controlled capitalism? Most of all, what would an America without Christianity as the dominating religion be like?