That's very interesting, thanks for posting it. There have been several books written on the subject. It really points out the power of movie characters as role models, particularly for young people who don't live in Indian communities. It is funny how he says, as he sits astride a horse on the plains of Minnesota, that he finally feels like a real Indian. I would love to see the movie.
Here is a trailer for it:
http://www.youtube.com/watch?v=HqVmqK5Nbuk
Bookmarks