This movie stands out as one of the best of a subgenre that doesn't have a lot of great movies representing it. The Post-Western Westerns starting coming out in the mid-sixties until Westerns were hard to come by during the mid-seventies.
These "modern" westerns are distinguished by turning the "white hat good guy" and "black hat bad guy" on their ear. The good guys are not only not perfect, but ruefully flawed, and the bad guys are often people who made mistakes along the way and would not be a threat to society if they were left alone. Examples of other "modern" westerns are Unforgiven (The Clint Eastwood movie), Hang 'Em High (notice a pattern- another Eastwood movie), and Dances With Wolves.
Lancaster's Marshall Maddox is doing his job, but at this stage in his career, he is a walking, talking, killing machine who is ready to kill anyone who gets in his way, and some people who want very much to get out of his way. He is typical of the modern western. Where older westerns emphasized clear moral and ethical boundaries, modern westerns portray a world much less certain and easy to navigate. A world full of shadows and lots of gray ambiguities.
This is a perfect representation of how people felt in 1971. This is a very good film.
