Which was used in the economies of both ancient egypt and ancient Mesopotamia

Ancient Egypt and Mesopotamia based their economies on agriculture. Each farmer paid taxes in the form of grain. This grain was used to feed the people in the event of a famine. Trading was a common feature in both the societies and commercial interaction with the outside world was extensive in both places.

Explanation:

john maynard keynes developed new economic theories in response to the : b) great depression of the 1930s. his theories are so important that they are known as "keynesianism". in his works he supports the idea of a government with deeper involvement and intervention to end the great depression.