This book investigates the efficacy and ethical implications of utilizing former extremists and combatants in programs designed to prevent and counter violent extremism (P/CVE). The authors, Clubb, Scrivens, and Islam, synthesize global case studies and programmatic data to evaluate how individuals who have exited radical movements can serve as credible messengers and mentors. By examining diverse contexts ranging from far-right radicalization to post-conflict paramilitary environments, the text provides a framework for understanding the role of 'formers' in de-radicalization and violence prevention efforts.

Experts in the field of counter-terrorism and sociology identify this work as a critical examination of the practical application of peer-led intervention strategies. Readers frequently note the academic rigor of the research, which provides a balanced view of the challenges inherent in leveraging former combatants for social stability.