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

Maybe not as many lives will depend on you at any particular moment, but no civilization could possibly rise here without your efforts.

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

Planetary civilizations rise and fall, but art goes on forever.

How do we know that a great civilization might not have risen and flourished here aeons ago?

And right before our eyes, civilizations rise and fall.

Little civilizations rise and fall under the tide of barbarism.

Scientists agree that human civilization rose on Mars long before it did so on any of the other worlds.

Civilizations can rise and fall, all without being significantly affected by the infall.

Our own experience tells us that civilizations rise and fall in less time than it takes to bat a cosmic eyelid.