Through the Parable of the Broken Window, Bastiat introduces the economic concept of Opportunity Cost. The parable describes a shopkeeper's son accidentally breaking his father's window. The spectators at the scene thought this was a good thing, as the glazier now had work. However, Bastiat says that "this theory is confined to what is seen; it does not take into account what is unseen". What is not seen is that the money, now spent on repairing the destruction, could otherwise have been used pr