And what if they don't have a contract, either because the interaction was nonconsensual, or because it is insanely impractical to negotiate a contract when buy

And what if they don't have a contract, either because the interaction was nonconsensual, or because it is insanely impractical to negotiate a contract when buying a stick of gum? Political scientists aren't all idiots, people. Social contract theory exists for a reason.