In Bastiat's tale, a man's son breaks a pane of glass, meaning the man will have to pay to replace it. The onlookers consider the situation and decide that the boy has actually done the community a service because his father will have to pay the glazier (window repair man) to replace the broken pane. The glazier will then presumably spend the extra money on something else, jump-starting the local economy. (For related reading, see Economics Basics.)
The onlookers come to believe that breaking windows stimulates the economy, but Bastiat points out that further analysis exposes the fallacy. By breaking the window, the man's son has reduced his father's disposable income, meaning his father will not be able purchase new shoes or some other luxury good. Thus, the broken window might help the glazier, but at the same time, it robs other industries and reduces the amount being spent on other goods. Moreover, replacing something that has already been purchased is a maintenance cost, rather than a purchase of truly new goods, and maintenance doesn't stimulate production. In short, Bastiat suggests that destruction - and its costs - don't pay in an economic sense.
