The story of the “broken windows” theory of urban decay is another example of how we instinctively overestimate the benefits of tidying up certain kinds of urban mess. The theory was proposed in an influential article in The Atlantic Monthly in 1982 by criminologist George Kelling and political scientist James Q. Wilson. Kelling and Wilson argued that small signs of disorder led to the breakdown of community norms and, eventually, to serious criminality. Here’s a taste of their argument: