''Sure, they traded between tribes, but as David Graeber makes the point above, there is no reason to assume that money should have arisen out of this trade, and there is no evidence for it. Randall Wray's argument is far more convincing, that money arose out of state penal systems as a means of enforcing debts.''
However the use of 'money' started in the first instance, however happened to grow and expand from that point on, money/currency as a means of exchange did happen and it did take off in a big way. There is no denying that, how or why it happened doesn't change that it did happen, and here we are.
