22 mar 2000 ano antes da era comum - began to transform human societies, began specialization of labor, social stratification, increased trade, coplex government systems, armies, increase population, increase urbanization. New technological innovations like iron weapons, chariots,, some record keepings like hieroglyphics, pictographs, alphabets. Monumetal architecture: pyramids, temples, defencive walls, roads, water systems and law codes.
Adicionado na linha do tempo:
Data:
22 mar 2000 ano antes da era comum
Agora
~ 4028 years ago