Perhaps because it came out the year I was born, I have a hard time imagining a world without A Fistful of Dollars, Sergio Leone and the spaghetti western. It's easy to forget how much this single film changed not just the western but the movie hero, whose credibility forever afterward came with stubble and unkempt hair, abundant sarcasm and an implacably bad attitude. It became an article of faith that the only honest way to look back at the world arrayed against the hero was through a squint. By the time I actually understood what a western was, Leone...