Containing all the elements of a classic Western, Martin Scorsese’s latest movie, Killers of the Flower Moon, packs a punch, but it is also psychologically complex and deeply spiritual, and leaves the viewer pondering existential questions: Why does guilt drive some people to remorse, and others over the edge? What is the strange calculus of greed that causes it to catch up with even the most cautious, best-intentioned person? What is the power of a lie, that it can blind a person to a truth staring him in the face?

The film raises that ancient and uncomfortable question: Who is my neighbor?