The attacks of 9/11 and the ‘global war on terror’ and its various legacies have dominated international politics in the opening decades of the 21st century. In response to the dramatic rise of terrorism, within the public eye and the academic world, the need for an accessible and comprehensive overview of these controversial issues remains profound. The seeks to fulfil this need. The volume is divided into two key parts: This book will be of great interest to all students of terrorism and counterterrorism, political violence, counter-insurgency, criminology, war and conflict studies, security studies and IR more generally.