Philly wants to bring back a version of an old strategy to fight gun violence. Specifics are pending.

Colombia has attempted to decrease murder and homicide rates by setting up curfews for teenagers, forcing bars to close earlier in the evening, and creating gun laws to prevent the carrying of weapons. As a result of this epidemiological, data-driven approach, along with other governmental factors, the homicide rate has decreased significantly in most of the cities in which it was implemented.

In the past, Los Angeles was a dangerous city fraught with gang wars. Lately, though, LA has become a safer city due to six changes enforced by the police cracking down on public violence and gangs.

Crimes against LGBT citizens have gone underreported in many U.S. cities. Washington DC’s Gay and Lesbian Liason Unit has employed and trained LGBT officers to represent community members that they protect and serve. After the establishment of the GLLU, the number of reported crimes has increased, demonstrating the comfort and trust that the community has with law enforcement.

In Houston, TX, many individuals with mental illnesses cycled in and out of emergency care while arrested or incarcerated. Houston’s police department has decreased the number of incarcerated who have mental illness by opening a division to mental health called the Chronic Consumer Stabilization Unit. Now Milwaukee seeks to replicate Houston’s results.

Milwaukee County’s mental health system put more resources in expensive emergency care rather than invest in programs that offer continual care. As a result, Milwaukee County identifies nine solutions from other cities that have had success in repairing mental health systems. Solutions include the ending of reliance on emergency care, expand community support programs, change laws, and supportive housing.

After a policeman shot and killed a teenage African American, a community in Cincinnati blamed law enforcement for racial profiling and riots expanded throughout the city. With the help of the Department of Justice as a mediator, Cincinnati made policy changes. The city now has an African American Police Association that brings police officers in communication with representatives of communities.

The militarization of police forces in cases such as Ferguson, Missouri’s riots has led the state of Utah to question what can be done to prevent such an overuse of force from happening. Utah expanded upon a law passed by Democratic legislature in Maryland, which Utah’s ACLU reworked with some libertarians, to require the police to provide data about SWAT team usage. Utah’s success demonstrates that demilitarization bills passed with bipartisan support are not impossible.

Richmond, California ranked among the highest homicide rates in the country. The city created the Office of Neighborhood Safety to engage the community in the effort to curb gun violence and prevent homicides. ONS works directly with the young people who are at risk and have succeeded in reducing the homicide rate.

Areas of High Point, North Carolina have suffered from crime, poverty, and neglect, until the city began implementing Operation Ceasefire, a policing program that uses data collecting, community support against crime. High Point is now leading the country in its success of Operation Ceasefire, boasting dramatic reductions in violent crimes, domestic abuse, robberies, and drug-related offenses.

A program in Philadelphia is pioneering new ways to treat the urban wounded. By seeing it as PTSD, and not pointing fingers, the city is using mental health tools to decrease violence and heal communities.