This document discusses using prevention science to guide community violence prevention efforts. It outlines that longitudinal studies have identified risk and protective factors that predict problems like delinquency and violence. Effective prevention programs target these factors. Some examples of effective programs described are Nurse-Family Partnership, Promoting Alternative Thinking Strategies (PATHS), the Bullying Prevention Program, and the Seattle Social Development Project. Research has shown these programs reduce risks like child abuse and improve outcomes such as school bonding and graduation rates. The document advocates using science-based approaches proven to work rather than unproven strategies that are more commonly used.