This chapter reviews research and theory on the development of aggressive behavior and violence from childhood to adolescence. We also summarize and discuss research on correlates, risk factors, markers, causal mechanisms, and consequences of aggressive behavior and violence. Due to space constraints, our review focuses on more recent developmental research and theoretical advancements in the past decade. In the introductory section, we present definitions and dimensions of aggression across development. Then we discuss current theories on adaptive and maladaptive functions of human aggression, and we identify cross‐cutting theoretical issues. Next, we describe subtypes of aggression, clinical classification, and measurement issues. Then the empirical literature related to the epidemiology of aggression from infancy to adolescence is reviewed, with a focus on normative developmental change and stability. The subsequent sections review the biological, individual, and socialization processes that are related to the development of aggressive behavior and violence. Lastly, we review macro‐level comparative research on aggression and violence. Finally, we discuss challenges in current research and identify areas for future research.