This document discusses violence and substance abuse in sports. It outlines different types of violence including contact sports, psychological abuse, and fan violence. It explores theories of human aggression and notes that most research suggests violence is socially learned. Substance abuse in sports is also examined, including performance enhancing drugs, pain killers, and recreational drugs. Reasons for athlete substance abuse include fame, financial rewards, and pressure to compete at an elite level. The document concludes by discussing potential remedies such as education, drug testing, and zero tolerance policies.