This meticulously crafted book features contributions from experts who explore the key phases of violent extremism. Divided into three comprehensive sections, the first examines the shifting threat landscape over the past two decades. The second section offers an in-depth analysis of the current threat, while the final part delves into the evolving nature of extremism and the emerging challenges it presents. It also integrates a critical counterterrorism perspective.Commemorating the 20th anniversary of the International Centre for Political Violence and Terrorism Research (ICPVTR), a specialist center within the S. Rajaratnam School of International Studies (RSIS) at Nanyang Technological University, Singapore, this timely publication provides essential insights in the face of the growing global terrorism threat.