Like so many before me, I owe a great deal to a great many, in ways that no acknowledgment could ever recompense. What is more, I owe it in ways that I cannot begin to credit properly. I can only offer my fullest thanks to Carol Creighton, Elizabeth Goldberg, Heather Janack, G. V. La Forest, Grant Lamond, David Lillico, David Paciocco, and Larry Taman.
This book has its roots, some direct, others now remote, in a doctoral thesis submitted at the University of Oxford. I am deeply grateful to the Attorney General of Ontario for research leave, to the Commonwealth Scholarship Commission in the United Kingdom and the British Council for fully supporting that research, to Balliol College for a Kulkes Scholarship, and to Columbia University for an External Awards Fellowship. I also thank my examiners, Nicola Lacey and Christopher McCrudden, for their helpful and constructive comments, and above all my supervisor, Joseph Raz, who was and remains uniquely inspiring, exacting, and supportive, both as a mentor and as a friend.
For support and particular guidance in making the book what it is now I thank the series editor, Gerald Postema, the anonymous reviewers for Cambridge University Press, and Stephanie Achard.
Finally, I particularly thank John Gardner for his friendship and support over the years since we were students together, for reading all I have written, and for offering acute criticism and ever sensible advice.
I cannot express what I owe to Gail Thorson, without whom nothing, and to whom this book is dedicated.