This article places media violence research into a broader context than the typical public debate about whether violent video games (or TV programs, or movies) are the cause of school shootings and other extreme acts of violence. We describe how scientists today decide whether one variable (e.g., exposure to violent media) increases the risks for, contributes to, or causes another (e.g., aggressive or violent behavior). We discuss the different research methods used to examine the relationship between exposure to violent media and aggressive and violent acts. We review research evidence on the link between exposure to violent media and aggressive behavior, violent behavior, and other undesirable behavior (e.g., less helping, less empathy and compassion for others). We conclude that although exposure to violent media is not the cause of aggressive and violent behavior, it is an important risk factor that can contribute to more aggressive and violent behaviors, and fewer prosocial behaviors.