Prehistoric technology Ground and polished stone tools continued to be created and used during the Neolithic period. Numeric record keeping evolved from a system of counting using small clay tokens that began in Sumer about 8000 BC. The Stone Age developed into the Bronze Age after the Neolithic Revolution. The Neolithic Revolution involved radical changes in agricultural technology which included development of agriculture, animal domestication, and the adoption of permanent settlements. The Bronze Age is characterised by metal smelting of copper and its alloy bronze, an alloy of tin and copper, to create implements and weapons. Polished stone tools continued to be
Neolithic Greece into nuclear families and settlements consisted of large megaron-type rectangular structures with timber-post frames and stone foundations. Many settlements were surrounded by ditches 1.5–3.5 meters deep and 4–6 meters wide, which were constructed probably to defend against wild animals and to protect goods by establishing the borders of the settlements themselves. The Late Neolithic I period was succeeded by the Late Neolithic II period (or LNII) where economic and social life in existing settlements continued uninterruptedly. The Final Neolithic (or Chalcolithic) period entails the transition from the Neolithic farming and stock-rearing economy to the metal-based economy of the Early Bronze