Describe the importance of the transition of humankind from a hunter-gatherer society to a food-producing society.

Comprise the given:

a) An explanation of the Paleolithic era.

b) Events that transformed society from the Paleolithic era to Neolithic era.

c) The explanation of Neolithic era.

d) The description of how the transition from Paleolithic to Neolithic was important in the development of Mesopotamia and Egypt.