>Of course I'm an engineer and know next to nothing about anthropology.
You're probably wrong here.
>There is no evidence, historical or contemporary, of a society in which barter is the main mode of exchange;[32] instead, non-monetary societies operated largely along the principles of gift economy and debt.[33][34][35] When barter did in fact occur, it was usually between either complete strangers or potential enemies.[36]
>Of course I'm an engineer and know next to nothing about anthropology.
You're probably wrong here.
>There is no evidence, historical or contemporary, of a society in which barter is the main mode of exchange;[32] instead, non-monetary societies operated largely along the principles of gift economy and debt.[33][34][35] When barter did in fact occur, it was usually between either complete strangers or potential enemies.[36]
https://en.wikipedia.org/wiki/History_of_money#Non-monetary_...