They know that even so, each civilization must inevitably fall.

If civilization should fall, things could get eerie and interesting.

Men have come close to the truth, but it was destroyed each time and one civilization fell after another.

I'll have to live with it long after your whole civilization has fallen to dust.

Surely their entire civilization will not fall because of this one act, however tragic it may be.

Can you imagine how many civilizations must have risen and fallen?

He believed that commercial civilizations rise and fall in predictable cycles.

Civilization was falling apart, on the homeworld of the Empire.

Another ten miles, and they turned off onto a road of packed dirt, and civilization fell behind.

It's been sitting right where it is for thousands of years as civilizations grew up and fell around it.