From this perspective, crime-fighting actions involve a wide range of dimensions: family, school, neighborhood, community, urban infrastructure, economic regulations, police, justice, and prisons. The available evidence (mostly for developed countries) shows that investing in the nutrition and early stimulation of children and promoting family environments with non-conflicting and proactive parenting have positive effects on people’s crime propensity, decreasing the incidence of crime. The same goes for interventions at school and in the peer group during adolescence to reduce youth criminogenic exposure. Despite their importance, these are medium- and long-term investments. In the short term, interventions affecting the environment and the opportunities for commiting crimes (such as, for example, improvements in public spaces, schedule limits on the sale of alcohol and targeted policing strategies, by type of crime or territory) could be very rewarding as well.