Make the moral argument ambiguous, or don’t show what the hero decides to do when he is confronted with his final moral choice. As soon as you move beyond the simple good versus evil moral argument, you force the audience to reevaluate the hero, the opponents, and all the minor characters to figure out what makes right action. By withholding the final choice, you force the audience to question the hero’s actions again and explore that choice in their own lives.
