This handbook explores how democracies around the world seek to balance democratic values with the requirement to protect their citizens from the threat of politically motivated violence. Over the past few decades, the majority of the world’s democracies have had to confront serious security threats, and in many instances these challenges have not come from rival states but from violent groups. This volume offers readers an overview of how some democracies have responded to such threats. It examines the extent to which authorities have felt compelled to modify laws to evade what would ordinarily be regarded as protected rights, such as personal privacy, freedom of movement and freedom of speech. Grounded in historical analysis, each of the sections addresses past and emerging security threats; legal and legislative responses to them; successful and unsuccessful efforts to reconcile democracy and security; and a range of theoretical questions. The case studies provided vary in terms of