If you take one rivet out of an airplane, it will be all right, it'll keep flying. You take another rivet out of the airplane and it still flies. So what the heck, let's take more rivets out of the airplane, and sooner or later, the airplane drops from the sky.
None of us know all the potentialities that slumber in the spirit of the population, or all the ways in which that population can surprise us when there is the right interplay of events.

