Where she found a primitive civilization not more than a thousand years old?

I found a matured civilization, immensely inferior, however, to that from which I came.

Pioneers, he and her, founding a new civilization on a new planet.

It is impossible to found a civilization on fear and hatred and cruelty.

They found at the site a lost civilization occupying an area greater than that of Pakistan.

Almost by accident he founded a civilization, or at any rate an educational system.

How long does it take to found a civilization?

He found a civilization whose chief political credo was economy and went on to observe future ages.

And thus he founds a new civilization.

We've found a starfaring civilization at last.