Broken Windows The police and neighborhood safety

 The broken windows model of policing was first described in 1982 in a seminal article by Wilson and Kelling. Briefly, the model focuses on the importance of disorder (e.g. broken windows) in generating and sustaining more serious crime. Disorder is not directly linked to serious crime; instead, disorder leads to increased fear and withdrawal from residents, which then allows more serious crime to move in because of decreased levels of informal social control. The police can play a key role in disrupting this process. If they focus in on disorder and less serious crime in neighborhoods that have not yet been overtaken by serious crime, they can help reduce fear and resident withdrawal. Promoting higher levels of informal social control will help residents themselves take control of their neighborhood and prevent serious crime from infiltrating.

http://www.theatlantic.com/magazine/archive/1982/03/broken-windows/304465/?single_page=true