The introductory chapter of this book presents the concepts of the bene?ts inherent in the study of comparative approach for an effective counterterrorism response on the local law enforcement level and overviews the inception of the project. Throughout the twentieth century and into the twenty-?rst century, especially after the events of September 11, 2001, the legitimacy of law enforcement practices has been cited as a major concern for international criminal justice. As policing pr- titioners and scholars throughout the world shifted focus from a traditional reactive, crime control stance to the need for accountability mechanisms to ensure the s- port of citizenry in combating crime and