The invisible hand — self-interested individuals producing the best aggregate outcomes — works only under specific conditions (rival, excludable, priceable goods like shoes or apples) and breaks down when stretched into a universal law, because public goods (clean air, trust, climate stability, biodiversity) cannot be sold in tidy units and markets by design undervalue what cannot be owned or priced; outcomes also depend on the rules of the game (regulations, property rights, power), so without guardrails the invisible hand points to short-term gains and long-term loss.