Research on bullying and victimization, especially in school settings, has become an important area of developmental research, with strong practical implications. In this article we overview some considerations from neuropsychology, quantitative genetics, developmental neuroscience, we discuss CU traits and conduct problems, individual, group, class and school levels of analysis, developmental changes by age and context, and cross-cultural aspects. Together we argue that these can help bring about a developmental science perspective on to this area of research.