Around 6,000 B.C., people began moving to the foothills of northern Mesopotamia and practicing methods of dry agriculture. These people were the first known farmers, and Hassuna became one of the most ancient centers for the principal forms of producing economies, such as the cultivation of soil and raising livestock. Evidence of this is shown in the oldest layers of Hassuna. The occupants of Hassuna also led the way in improving agriculture, settling the river valleys, the beginning of irrigation, and progress in all branches of production and culture.