George Lee Kelling (1935-2019) was a prominent American criminologist best known for co-developing the seminal 'broken windows' theory of policing with James Q. Wilson in a 1982 Atlantic Monthly article. This theory posited that visible signs of disorder, such as broken windows, if left unaddressed, lead to more serious crime, influencing policing strategies worldwide, including the adoption of zero-tolerance policies in cities like New York under Mayor Rudy Giuliani and Police Commissioner William Bratton, with whom Kelling collaborated professionally. Born in La Crosse, Wisconsin, Kelling began his career as a social worker and probation officer before entering academia, where he emphasized community-oriented policing to build trust between law enforcement and residents. He held academic positions at several institutions, including Northeastern University (where he taught in the 1970s and 1980s) and Rutgers University–Newark's School of Criminal Justice, and served as a senior fellow at the Manhattan Institute for Policy Research and as a fellow at Harvard University's Kennedy School of Government. Throughout his career, Kelling advised numerous police departments on implementing community policing strategies and contributed to policy discussions on urban crime reduction. His work bridged sociology, criminal justice, and public policy, earning him recognition as a key influencer in American law enforcement reform. Kelling's ideas faced criticism for potentially justifying over-policing in minority communities, but he advocated for balanced approaches that prioritized order maintenance without excessive force. He continued writing and consulting until his later years, passing away in 2019 at age 83. His legacy endures in ongoing debates about proactive policing and its societal impacts.