Trade is very old. In the state of nature, trade is something people do to their enemies. They don’t trade with kin.
A person gives things, just as she gives songs or stories or visions to her kin. The receiver may or may not reciprocate on some other occasion. The giving is the source of satisfaction. We will be so far removed from this, we will not understand. That will be our shortcoming, not hers.She trades only with enemies. If a hostile group, whether near or distant, has something she wants, she and several well-armed cousins go to the hostiles with something the hostiles might want. She offers her gift, and the hostiles had better offer the thing she wants on the spot or she’ll carry her gift right back to her village.Soon after the rise of the first Ur, trade becomes extensive. Virtually everyone is now everyone else’s enemy.
— Fredy Perlman (Against His-Story, Against Leviathan)