But I have learned that their great strength is also the precise location of their weakness, because a person who believes he has thought of everything stops watching for the things he did not think of.

His confidence becomes a blindfold.

He grows certain the machine is complete, and in that certainty he stops looking at the edges, and it is always at the edges that the world keeps the small, stubborn, unaccounted-for things — a boy’s sharp eyes, a wife’s steady nerve, an old phone, a bag of peas.

The planners are undone not by bigger planners but by the ordinary, the overlooked, the things too small and too human to fit inside a scheme.

Christopher controlled the food and the phones and the story.