The movie is a revisionist Western; a genre that, depending on your perspective, started sometime in the '60s, '70s, or with this very motion picture, and which seeks to replace the frothy Romantic idea of a morally untroubled American frontier, as depicted in such undemanding matinee adventures as The Searchers and The Naked Spur and such * , with a grimmer, more consequential depiction of the violence and cruelty and muddy nastiness of a world inhabited by the men and women (but mostly men) who would hear stories of a lawless wilderness largely untouched by human society and the "civilization" of the east, and think that sounded like exactly the right place to be.