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 tomb Neolithic tomb The Neolithic tombs of Northwestern Europe, particularly Ireland, were built by the Neolithic (New Stone Age) people in the period 4000 - 2000 BC. There are four main types: All these types of tomb were built from large slabs of rock which were uncut or worked only slightly. In each case, there was a "doorway" made from two large stones facing each other. The doorway led to an inner chamber, or a passage and chamber, lined with flat slabs. In all but the portal dolmens, the tomb was then covered in earth and small stones to make a