The 'broken windows' theory, proposed by James Q. Wilson and George Kelling, links crime and disorder, suggesting that unchecked minor offenses lead to a breakdown of community controls and increased serious crime. Their famous experiment by Philip Zimbardo illustrated how untended property invites vandalism, with contrasting outcomes in the Bronx and Palo Alto. This theory influenced policing strategies, particularly 'zero-tolerance policing,' which gained traction in New York City during the 1990s.