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The 9th millennium BC marks the beginning of the Neolithic period.
Agriculture spreads throughout the Fertile Crescent and use of pottery becomes more widespread. Larger settlements like Jericho arise along salt and flint trade routes. Northern Eurasia is resettled as the glaciers of the last glacial maximum retreat. World population is at a few million people, likely below 5 million.
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Events
8000 BC - 7000 BC; Jericho had about 2000 inhabitants living in mud-brick houses protected by a stone wall 5 feet thick and 12 to 17 feet high. The site covered 6 acres.
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Environmental changes
Circa 8000 BC– World - Rising Sea
Circa 8000 BC– Antarctica - long-term melting of the Antarctic ice sheets is commencing
Circa 8000 BC– Asia - rising sea levels caused by postglacial warming
Circa 8000 BC– World - Obliteration of more than 40 million animals about this time
Circa 8000 BC– North America - The glaciers were receding and by 8,000 B.C. the Wisconsin had withdrawn completely.
Circa 8000 BC– World - Inland flooding due to catastrophic glacier melt takes place in several regions
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Inventions and discoveries
c. 8000 BC – Middle East - Ancient flint tools from north and central Arabia belong to hunter-gatherer societies.
c. 8000 BC – Exchange of goods, a three-dimensional combination of an accounting/inventory system and medium of exchange.
c. 8000 BC – Exchange of goods may represent the earliest pseudo-writing technology.
People of Jericho started to mold bricks out of clay, then hardened them in the sun.
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