In Part I we describe the basic issues concerning violent video games, past research, and our theoretical approach. Chapter 1 presents a brief history of violent video games, youth exposure to such games, and an overview of things to come. Chapter 2 lays out a host of conceptual viewpoints involving definitions, methodologies, and guiding principles. It then provides a brief review of prior media violence research, with a special emphasis on research involving the effects of violent video games. Chapter 3 presents the General Aggression Model in somewhat more detail, and shows how that model can be used to understand developmental processes and a risk and resilience approach to human aggression. It concludes with a section on how the General Aggression Model can be used to understand and predict effects of media violence on the development of aggressive behavior and aggressive personality.