I wish to thank the organizers of the XIX International Congress on Comparative Law held in Vienna in July 2014 for selecting comparative counter-terrorism law as a topic and for giving me the great privilege of serving as General Reporter on the topic. I thank all the national reporters for their hard work on their reports and subsequently on their chapters and for their helpful comments on my general report. I also thank Professor Ulrich Sieber, Director of the Max Planck Institute for Foreign and International Criminal Law in Freiburg, Germany, for chairing the session in Vienna and for his wise comments. My work on this project has been made possible by the support of the Faculty of Law, University of Toronto, and in particular by the excellent organizational work of my assistant Nancy Bueler and by the dedicated and creative research assistance of the staff of the Bora Laskin Law Library. My work has also been greatly assisted by the generous funding and other support provided by the Pierre Elliott Trudeau Foundation by way of the award to me of a 2013 Trudeau Fellowship