More mysterious than ever, Sergio Leone’s ode to (condemnation of?) revolution is said to be the centerpiece of his three ‘Once Upon a Time’ movies linking western violence to the modern age of brutal politics and ruthless gangsterism. Crudeness rubs shoulders with sad, beautiful images as Leone takes on a theme he claimed not to like very much. The writers Donati and Vincenzoni show him the way, while James Coburn and Rod Steiger bring to life the non-narrative moments of what becomes a broad, mural-like epic.