In Hollywood, central casting does a great job of selecting actors to portray villains. You know the type: Dark, shadowy, unshaven; surrounded by henchmen, and armed with a devious plot to create physical, emotional, or financial harm on some unwilling protagonist. In establishing these villains, directors do a great job of telling us why the "bad guys" do what they do; what motivates them; and, ultimately, how good will triumph over evil.