I know you shouldn't generalize when talking about a total tribe or race of people, but I believe the Choctaw are one of the success stories when you look back at the history of Indians in America.
The tribe definitely suffered at the hands of European Americans, and the article highlights that suffering when it talks about all the lives that were lost on the Trail of Tears. However, the Choctaws have done a great job of reclaiming their independence since then.
I have been on several Indian reservations, and the conditions on some of them are difficult to look at because of all the poverty and substance abuse that you see all around. The Choctaw Nation in Oklahoma is remarkable in its organization and in the way the people have managed to retain some of the Choctaw history and culture while embracing the changes of the future.