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
Pastoral Neolithic goats) in the eighth to seventh millennia BP. As the grasslands of the Sahara began drying out in the mid-Holocene, herders then spread into the Nile Valley and eastern Africa. During the Pastoral Neolithic in eastern Africa (4500-1200 BP), archaeologists have identified two pastoralist groups who co-existed alongside Eburran phase 5 hunter/gatherers; these groups are known as the Savanna Pastoral Neolithic and the Elmenteitan. The Pastoral Neolithic in eastern Africa was followed by the Pastoral Iron Age approximately two thousand years ago, during which agriculture, iron technology, and Bantu languages spread into the region. Pastoral Neolithic The Pastoral Neolithic refers