Our whole technological civilization could be wiped out in a flash.

"Is the surface of a planet really the right place for expanding technological civilization?"

A small city cannot establish or maintain a great technological civilization.

At this time, Earth is still home to a technological civilization, albeit one which has to deal with nuclear terrorism.

At least half the population would perish in the conflict, and technological civilization might come to an end.

But there's no evidence of technological civilization anywhere on the surface.

You have a technological civilization, advanced science, the whole bit.

Any technological civilization has to have been built in response to a need.

"All right, a technological civilization has to have rewards," he said.

Somewhere there may be intelligent life and a technological civilization.