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 and Bronze Age rock art in the British Isles Neolithic and Bronze Age rock art in the British Isles In the Neolithic and Bronze Age British Isles, rock art was produced across various parts of the islands. Petroglyphic in nature, the majority of such carvings are abstract in design, usually cup and ring marks, although examples of spirals or figurative depictions of weaponry are also known. Only one form of rock art in Europe, this late prehistoric tradition had connections with others along Atlantic Europe, particularly in Galicia. The study of rock art in the British Isles was largely initiated by amateur researchers rather than academic or other professional