What was at first? The basis of all early commerce was barter Cattle are probably the oldest of all forms of money, as domestication of animals tended to precede the cultivation of crops. The earliest evidence of banking is found in Mesopotamia between 3000 and 2000 B.C.
People in early societies developed forms of proto-money Aztecs used cacao beans Norwegians used butter The early U.S. colonists used tobacco leaves and animal hides The people of Paraguay used snails. Roman soldiers were paid a "salarium" of salt. On the island of Nauru, the islanders used rats. Human slaves have also been used as currency around the world…