Since I have an aversion to movies in which people say grace at the dinner table (not to the practice but to how movies use it to establish the moral… - Pauline Kael

This is a nature-boy movie, a kid's daydream of being an Indian. When Dunbar has become a Sioux named Dances with Wolves, he writes in his journal that he knows for the first time who he really is. Costner has feathers in his hair and feathers in his head.

In movies, the balance between art and business has always been precarious, with business outweighing art, but the business was, at least, in the hands of businessmen who loved movies. As popular entertainment, movies need something of what the vulgarian moguls had — zest, a belief in their own instincts, a sentimental dedication to producing pictures that would make their country proud of their contribution, a respect for quality, and the biggest thing: a willingness to take chances. The cool managerial sharks don’t have that; neither do the academics. But the vulgarians also did more than their share of damage, and they’re gone forever anyway. They were part of a different America. They were, more often than not, men who paid only lip service to high ideals, while gouging everyone for profits. The big change in the country is reflected in the fact that people in the movie business no longer feel it necessary to talk about principles at all.

If there is any test that can be applied to movies, it's that the good ones never make you feel virtuous.