The plot seemed quite fresh (even after my second viewing), though on analysis it includes familiar themes: tension between brothers, conflict between son and father leading to tragedy. A lot of this is down to the way it portrays the steady - not to say rapid - deterioration of the elder son so that he becomes a murderer; Tab Hunter deserves a lot of credit for this; at first he seems to be just a bit of a tearaway, but at the end he looks really vicious.
I like Van Heflin. He was great as the tortured Athos in "The Three Musketeers" and the decent homesteaders in "Shane" and "3.10 to Yuma", but I'm not sure that he carries off being the tough patriarch who won the country from the Indians.
Viewing the film in the political correctness of 2007, I blinked at the verbal racial abuse inflicted on the native Americans; two days later, I'm still trying to think of another 1950s Western where it was so overt. (I'm talking of verbal abuse, rather than cowboys killing lots of Indians.) The film proceeds at a pleasing rate, except for the somewhat overlong shooting-at-bottles scene very early on.
I don't know if "I'm a Runaway" was ever a "proper" song, but it was quite catching, even when sung by Hunter, and for once I didn't object to a musical interlude in an action film.