The City of New York and most of the largest cities across the United States had been plagued by consistently increasing crime and violence rates for numerous decades through the early 1990s. Homicide rates had reached astonishing and clearly disturbing levels, with murders topping more than two thousand annually in New York City alone. It was not until the appointment of William Bratton as Police Commissioner of the New York City Police Department (NYPD) in 1994 that crime rates took an impressive turn and commenced two decades of remarkable decline across all variations of serious crime. Following the guidance of leadership principles outlined by James Collins, Police Commissioner Bratton immediately reengineered the management and strategic deployment practices of the agency. The NYPD implemented real-time crime analysis, utilizing a computer program called COMPSTAT. The deployment of resources to the identified crime and disorder hotspots was accompanied by a proactive enforcement-oriented mandate. In the first year of the new leadership practices, the crime rate in New York City declined −14%. After 20 years, many of the most serious offences, including criminal homicide, declined −90%. In addition, similar priorities and approaches have been placed on traffic safety, community disorder, and organizational professional standards. This chapter will outline the historical and background factors related to these noteworthy accomplishments.