Asia
The coastal periphery was home to some of the world's earliest known civilizations, each of them developing around fertile river valleys. The civilizations in Mesopotamia, the Indus Valley and the Yellow River shared many similarities. These civilizations may well have exchanged technologies and ideas such as mathematics and the wheel. Other innovations, such as writing, seem to have been developed individually in each area. Cities, states and empires developed in these lowlands.
History of ancient Lebanon
The earliest known settlements in Lebanon date back to earlier than 5000 BC. In Byblos, which is considered to be the oldest continuously inhabited city in the world, archaeologists have discovered remnants of prehistoric huts with crushed limestone floors, primitive weapons, and burial jars which are evidence of the Neolithic and Chalcolithic fishing communities who lived on the shore of the Mediterranean Sea over 8,000 years ago.