>>3495364wen there was monetary system (money),
contribution was obrigatory.
exemple:
you could only buy chiken, by selling what the vendor whanted, lets imagine tthe vendor whanted a caw and the seller only had a cammel, well there would not be any deal then :)
this means the economic system created a system that the buyers do not need to contribute to the vendors will, got it ?
money is unfair even as business.
