Myron Magnet (great name) is Editor-at-Large of City Journal. He has written an explanation of broken windows policing, including its history of success in New York City, and a description of the chaos that has followed its termination by Mayor de Blasio.
Broken windows policing worked, so of course it had to go. Too many members of de Blasio's base earned arrest records for being the scofflaw fools proactive policing doesn't suffer gladly.