Gun violence has sharply declined in California's Bay Area. What happened?

Across the country, hospitals are embracing intensive intervention programs to help victims of violence — including those who have criminal histories — after they have been brought in for treatment of injuries. Such programs can help prevent retaliation, reduce the chance a patient will be violently injured again, and put people on track for success.

The Centre for the Prevention of Radicalization Leading to Violence in Quebec has expanded rapidly, becoming a model for programs around the world. What sets it apart from projects in Europe and the United States is that it confronts extremism of all stripes — not just Islamist — and focuses on behavior that signals the risk of violence, not just radical ideas, only involving law enforcement as a last resort.

In a rapidly gentrifying Mexico City neighborhood, two artists refurbished an icon and set up an altar for Santa Mari La Juaricua, a saint to protect residents from eviction. The saint raises awareness and acts as a reminder about housing issues and the icon has been taken up by the residents and has been used in processions and protests.

In Colorado, four communities are piloting a program that offers low-level drug or prostitution offenders an alternative to prison. This program, known as Law Enforcement Assisted Diversion, matches the offender with a case manager who in turn connects them with treatment and training resources.

In Mancos, Colorado, the school board voted “no” to arming school staff in the traditionally Western town. Across the United States, the question of arming teachers is being brought up as a response to the increase in school shootings. The policy is highly contested, with some saying it provides students with a feeling of safety, but others saying the risks associated are too high. For the Mancos community, such a vote is a surprise given the town’s gun-friendly history, but is explained by the increase in new residents.

The Law Enforcement Assisted Diversion (LEAD) program in Alamosa, Colorado, gives police officers the option of sending people to substance abuse treatment rather than straight into the criminal justice system. Used in non-violent cases, the diversion program is based on a harm-reduction model that uses a health-care approach rather than a punitive approach to address the underlying issues when a crime is committed. Some police officers object to the program's mission, but proponents say that forcing compliance would be counterproductive.

The Women’s Collective is a nonprofit that works with more than 10,000 subsistence farmers in the Indian state of Tamil Nadu to promote food security using millets, a crop resilient to drought and climate change. For Pavitra, one of those farmers, she began cultivating the ancient grains in 2015 and now has more than enough food to feed her family year-round. However, there’s a lack of public investment in millet production and machinery. And there’s no unified effort to create demand for millets: Some state governments lead the charge and in other states, it’s led by grassroots organizations.

Crime-tracking mobile apps give millions of Brazilians crowdsourced data on urban violence, alerting people to dangerous places and filling gaps in government data on shootings, robberies, and other risks. But apps such as Fogo Cruzado (“Crossfire”) and Onde Tem Tiroteio (“Where There's a Shooting”) offer statistically crude glimpses of crime, distorted by media and racial biases that one expert blames for myths about the risks people actually face.

As an alternative to traditional courts, community courts provide resources to those experiencing homelessness. Fines and jail time are often the punishment in traditional courts for those charged with trespassing or loitering, but community courts provide services that help people find housing, jobs, health care, and even offer mobile showers, food stamp assistance, and mental health care. While the long-term data are lacking and don't offer a clear picture of recidivism rates, community courts do provide a better quality of life for those living on the streets.

A New York-based nonprofit called Students for a Free Tibet is training Tibetans in "how to stage nonviolent protests." This effort, in conjunction with other Tibetan NGOs, has helped activists in Dharamsala, India to become "more organized, media savvy and technologically sophisticated," which in turn has increased the number of people who have come together to participate in the nonviolent protests.