 Although the Late Natufian experienced a slight reversal in this trend (possibly a result of the cold climatic period the Younger Dryas) as their community size shrank and they became more nomadic, it is believed that this culture continued through and was the foundation for the Neolithic Revolution.The Neolithic period is traditionally divided to the Pre-Pottery (A and B) and Pottery phases.PPNA developed from the earlier Natufian cultures of the area.