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
Neolithic Tibet while findings in Qamdo resemble the Dadunzi site in Yunnan, although there may be some connections with the Neolithic culture of the Yellow River valley. Neolithic Tibet Neolithic Tibet refers to a prehistoric period in which Neolithic technology was present in Tibet. Tibet has been inhabited since the Late Paleolithic. During the mid-Holocene, Neolithic immigrants from northern China largely replaced the original inhabitants, bringing with them elements of Neolithic culture and technology, although a degree of genetic continuity with the Paleolithic settlers still exists. During the mid-Holocene, Neolithic settlers from northern China migrated to Tibet, possibly from a mixture of