In primitive societies before money came into use,exchange of products between people took place.It is known as barter system.A tribe which produced goods in excess of its requirements made over the excess goods to another tribe in exchange for the goods produced by them.
The transaction of goods was at three levels including reciprocity,redistribution and commercial exchange.Reciprocity was based on mutual understanding of the needs of two groups.When a group produced goods in excess of its own requirments it gifted the excess to others.The receiving group gave a helping hand to the other group in times of need.
