This book examines the global phenomenon of school violence and its wide range of behaviours, from school shootings to minor theft, bullying and sexual harassment. Studying the Nordic countries and taking Sweden as an example and case study, the book discusses key features of sexuality, bullying and cyberbullying, radicalization, and violent extremism. It examines different approaches to school violence and discusses them in relation to political and ideological influences, gender relations, and socio-economic conditions. It presents trends in prevention of school violence, policing the school and dilemmas in educating against violent extremism. Since most of the research in this field has been done in post-industrial democracies such as Australia, the UK and the US, the book contributes to the debate by offering new perspectives on violence in schools from the Nordic countries.