Wilson and Kelling use the the phrase ‘broken windows’ to stand for all the various signs of disorder and lack of concern for others that are found in some neighbourhoods. This includes undue noise, graffiti, begging, dog fouling ,littering, vandalism and so on. They argue that leaving broken windows unrepaired, tolerating aggressive behaviour etc. sends out a signal that no one cares. There is a lack of social control, which further amplifies crime.