This study is part of a multiyear effort by the Mexico Institute at the Woodrow Wilson International Center for Scholars and the Justice in Mexico Project at the University of San Diego to analyze the obstacles to and opportunities for improving citizen security in Mexico. Each of the authors featured in this edited volume makes a significant contribution to this endeavor through original research—including exhaustive data analysis, in-depth qualitative interviews, and direct field observations—intended to inform policy discussions on how to foster robust civic responses to the problems of crime and violence. This research was developed with an intended audience of policymakers, journalists, leaders of nongovernmental organizations, and other current and future leaders working to address these problems in Mexico. However, there are also important lessons from Mexico’s experience that may have resonance in elsewhere in Latin America and other societies grappling with similar challenges.