Supporters of a measure to expand background checks for firearm purchases decried the bill's death in the Senate last month. But was the defeat really such a bad thing?

Had it passed, it would have been hailed as a huge breakthrough by some and a huge mistake by others. But on the ground, where American citizens are being shot and killed every day, nothing much would have changed.

The fact is that most of the recent gun debate entirely missed the point about the nature of most gun violence in America. The largest share - up to three-quarters of all homicides in many cities - is driven by gangs and drug crews. Most of the remainder is also concentrated among active criminals; ordinary citizens who own guns do not commit street robberies or shoot their neighbors and wives. Measures aimed at high-capacity magazines and military-style rifles, which could conceivably have helped address Newtown-style shootings, had been stripped from the bill that died in the Senate.

Even if those provisions had been passed, the guns involved in the vast majority of crimes are everyday handguns. Background checks and increased attention to gun trafficking would have made some small difference in keeping guns out of the hands of criminals. But the neighborhoods where this violence is concentrated, most of which are poor and minority, need real help, and they would not have gotten it from the Senate bill.

The most powerful interventions aimed at day-to-day gun violence lie elsewhere. In the absence of any movement in the larger gun debate, mayors, police chiefs, prosecutors and academics have been moving on their own - and have made real progress. The way forward lies in two directions.

One is to focus on "hot" groups and individuals. Gun violence turns out to be driven by a fantastically small number of people: about 5 percent of the young men in the most dangerous neighborhoods. It is possible to identify them, put together a partnership of law enforcement, community figures and social service providers, and have a face-to-face engagement in which the authorities say, "We know who you are, we know what you're doing, we'd like to help you, but your violence has to stop, and there will be serious legal consequences if it doesn't."

The original version of this approach, Operation Ceasefire in Boston, cut youth homicide by two-thirds and all homicide by half. A version aimed at parolees with violent criminal records returning to particularly hot Chicago neighborhoods cut homicide by nearly 40 percent. Boston's strategy has since been put in place in many cities. Chicago's approach is now being replicated in New York state, including in three New York City neighborhoods. Research on the basic approach shows consistently positive outcomes.

The second strategy involves focusing on "hot" places. Even in high-crime communities, gun violence is concentrated geographically. It is particular blocks and corners, not whole neighborhoods, that are at highest risk. Rutgers University criminologist Anthony Braga has found that such places often stay hot for decades. Focused police attention on those places pays demonstrable dividends. Mere presence works; more sophisticated problem-solving efforts work better.

These approaches can work quickly, and they sidestep the culture war on guns because they require no legislative action. Most important, they bring relief to the beleaguered communities that need it the most.

Cities need help from the federal government, however. A relatively small investment nationally would provide what they need to understand, implement and sustain these approaches across the nation.

Not long ago, violent crime was a clear federal priority. Efforts included the Clinton administration's Office of Community Oriented Policing Services, or COPS, and the George W. Bush administration's Project Safe Neighborhoods. Earlier versions of both have been rightly criticized for a lack of focus: the COPS office for essentially being a jobs program for police, and Project Safe Neighborhoods for allowing federal prosecutors to do pretty much whatever they wanted as long as they said it was about gun crime. Both programs are shadows of their former selves, but they could be used to bring the federal government back into a game that it should never have left.

Washington could use vehicles such as the Community Oriented Policing office and Project Safe Neighborhoods to say to cities: These things work, and we will help you implement them. In the vacuum left by the failure of the Senate to act, it not only could but should.

David M. Kennedy is the director of the Center for Crime Prevention and Control at John Jay College of Criminal Justice. His most recent book is "Don't Shoot: One Man, a Street Fellowship, and the End of Violence in Inner-City America." He wrote this for the Los Angeles Times.