The document summarizes research on the broken windows theory. It discusses how three studies found that residents' perceptions of neighborhood disorder were influenced more by the racial demographics moving into the area rather than actual physical disorder. A second study found that people were more likely to commit petty crimes in visibly disorderly neighborhoods. However, the broken windows theory alone cannot account for New York City's crime drop in the 1990s, as other policing strategies targeting serious crime were also implemented. In conclusion, the document suggests that a combination of cleaning up neighborhoods and increased policing may help improve community safety.