The reason why human civilization originated in Asia is:

First of all, we should make it clear that the civilizations that originated in Asia are: ancient India, ancient China and ancient Babylon.

The birth of human civilization needs the necessary conditions: suitable climate, abundant water, fertile soil, rich vegetation and prey, and flat terrain.

Analyze each civilization in detail:

Ancient India: Located in the Ganges and Indus river basins, it is rich in water resources, fertile soil and flat terrain. Its climate is a tropical monsoon climate with both rain and heat, which is suitable for the development of early farming civilization.

Babylon, Cuba: Located in the two river basins, although the climate is tropical desert, the Euphrates and Tigris rivers are rich in resources, fertile in soil and flat in terrain, which are also suitable for the development of early farming civilization.

Ancient China: Yellow River and Yangtze River basins (mainly the Yellow River basin). The early Yellow River basin had dense vegetation and a suitable climate. At the same time, loess is also a kind of soil suitable for farming and the development of early farming civilization.

Supplement ancient Egypt: ancient Egypt is located in the Nile valley. With the help of the fertile soil brought by the Nile flood season, the ancient Egyptians cultivated on the fertile soil after the water receded, and at the same time, there was Nile water irrigation, which was also suitable for the development of early farming civilization.

In a word, it is inevitable that the world's major civilizations will appear in the river basin.