Among other possibilities, money was invented to make it possible for a foolish man to control wise men; a weak man, strong men; a child, old men; an ignorant man, knowledgeable men; and for a dwarf to control giants.
You are more likely to find three TVs inside a randomly selected house than you are to find a single book that is or was not read to pass an exam, to please God, or to be a better cook.