The Asian history could be seen as the combined history of many diverse outlying littoral regions such as, South Asia, East Asia, and the Middle East connected by the internal frame of the Eurasian steppe.
The littoral border was to some of the world's most primitive civilizations, with each of the three sections evolving early civilizations about the lush river vales. These valleys were rich as the earth there was fertile and could produce several root crops. The civilizations in the Indus Valley, Mesopotamia, and China had many things in common and probably traded expertise and philosophies like mathematics and the wheel. Other concepts like writing probably developed independently in every region. Cities, states and then kingdoms established in these wetlands.