The common feature of ancient civilizations in Asia and Africa is that they are located in the big river basin and have established a unified slave country, with agricultural economy as the mainstay.
① Located in the river basin.
Babylon is located in the Euphrates River and Tigris River, which is roughly the same as today's Iraq. There was the Ganges River in ancient India. Ancient Egypt was the Nile. Ancient China was the Yellow River.
(2) A unified slave country was established.
An ancient civilization refers to an established country. According to historical materialism, human society is divided into primitive society, slave society, feudal society, capitalist society, socialist society and communist society. There was no real country in primitive society, and the emergence of the country was inseparable from the development of slavery.
(3) give priority to with agricultural economy.
All countries located in the river basin have relatively fertile land, abundant water and mild climate, which are suitable for agricultural work.