Book excerpt: This excerpt from the “masterful, timely, data-driven” study of the gun control debate examines the potential of stronger purchasing laws (Choice). As the debate on gun control continues, evidence-based research is needed to answer a crucial question: How do we reduce gun violence? One of the biggest gun policy reforms under consideration is the regulation of firearm sales and stopping the diversion of guns to criminals. This selection from the major anthology of studies Reducing Gun Violence in America presents compelling evidence that stronger purchasing laws and better enforcement of these laws result in lower gun violence. Additional material for this edition includes an introduction by Michael R. Bloomberg and Consensus Recommendations for Reforms to Federal Gun Policies from the Johns Hopkins University.