This book brings together a rich selection of speeches, papers and articles by the author drawn from his long and diverse experience in international criminal justice. It touches on the development and implementation of prosecutorial strategies, the challenges of investigation and prosecution of international crimes and the responses to such challenges and on specific issues including the work and legacy of the UNICTR (Rwanda tribunal), prosecuting sexual and gender based crimes, arrest and tracking of fugitives, giving effect to complementarity, international cooperation to combat international crimes as well as a vision of the future of international criminal justice. An excellent guide and source from one of the world’s leading practitioners of international criminal justice.