This area has been inhabited by agricultural civilizations for at least 5,000 years.

Vietnam has been, for much of its history, a predominantly agricultural civilization based on wet rice cultivation.

Its 1909 Report called for rebuilding a great agricultural civilization in America.

They described their find as the capital of an agricultural civilization of the Chorotegan people.

It visually shows the agricultural civilization of Haimen's past, present and future.

Nearly all the agricultural civilizations have been heavily constrained by their environments.

And the t'Kelans in this area did achieve an agricultural civilization once, thousands of years ago.

During the long epoch of agricultural civilization, societies were marked by low transience.

They were a far more primitive race than we, having just made the transition from a nomadic to an agricultural civilization.

Yet even for this highly developed agricultural civilization, such experiments proved to be failures.