The men who had presided over the construction of a complex modern civilization apparently did not know how to keep it running smoothly.

The island at one time supported a relatively advanced and complex civilization.

What little I've learned points to a complex civilization, and a great struggle between two races.

The division of labor made people depend on one another and led to more complex civilizations.

They show a complex civilization, many of whose activities we can only dimly understand.

From isolated tribal groups, he has gone on to create an amazing and complex civilization, in just ten thousand years.

First populated more than 13,000 years ago, the country produced complex indigenous civilizations before being conquered by the Spanish in the 16th century.

China is one of the world's oldest and most complex civilizations.

To sociology, psychology, to engineering, to all the various facets of a complex civilization.