Neolithic Revolution as irrigation and deforestation which allowed the production of surplus food. Other developments found very widely are the domestication of animals, pottery, polished stone tools, and rectangular houses. These developments, sometimes called the Neolithic package, provided the basis for centralized administrations and political structures, hierarchical ideologies, depersonalized systems of knowledge (e.g. writing), densely populated settlements, specialization and division of labour, more trade, the development of non-portable art and architecture, and property ownership. The earliest known civilization developed in Sumer in southern Mesopotamia (); its emergence also heralded the beginning of the Bronze Age. The relationship of the above-mentioned Neolithic characteristics
Pre-Pottery Neolithic Pre-Pottery Neolithic The Pre-Pottery Neolithic (PPN, around 8500-5500 BCE) represents the early Neolithic in the Levantine and upper Mesopotamian region of the Fertile Crescent. It succeeds the Natufian culture of the Epipaleolithic (Mesolithic), as the domestication of plants and animals was in its formative stages, having possibly been induced by the Younger Dryas. The Pre-Pottery Neolithic culture came to an end around the time of the 8.2 kiloyear event, a cool spell centred on 6200 BCE that lasted several hundred years. The Pre-Pottery Neolithic is divided into Pre-Pottery Neolithic A (PPNA 8500 BCE - 7600 BCE) and the following Pre-Pottery