we're gonna have to
rebuild CIVILIZATION.
The Big Bang Theory Season 12, Episode 14
They exist in case we ever make contact
with an alien CIVILIZATION.
The Big Bang Theory Season 9, Episode 10
...that any space-faring CIVILIZATION
would have to possess is touch.
The Big Bang Theory Season 8, Episode 21
could be evidence
of alien CIVILIZATION.
The Big Bang Theory Season 12, Episode 20
End of human CIVILIZATION.
Westworld Season 3, Episode 8