Now they stood second only to Earth as a center for human civilization.

There would also be a price to pay for civilization.

How could he ever give this up again for civilization?

What does this mean for American civilization as we know it?

After what we've learned, we must attempt a break for civilization.

"Your support for civilization isn't so deep as all that."

And yet you tell me not to despair for civilization.

"In any case, the sooner I clear out of here for civilization, the better."

I finally figured out the key was to avoid what passed for civilization.

There have always had to be sacrifices for higher civilization.