Gainer in “Unfinished Business”

Now I don't care what reading of history you take. The pattern is always the same. Whenever a bacterium invasion strikes or a fire rages or a wild beast roams the streets. Then and only then do men stop fighting each other and work together to save themselves. A common enemy, a common fear. That is the only answer. If all the men of the Earth are threatened by an enemy from a hostile planet... well, gentlemen, we are going to create that enemy.