I wish first of all to thank W. H. Newton-Smith, S. M. Lukes, and G. A. Cohen who supervised the doctoral thesis on which this book is based. Without their help, the book would have been more inadequate than it is. I am indebted to Charles Taylor who read sections of the manuscript and brought a critical issue in sharper focus. I am especially grateful to my examiners, Martin Hollis and John Torrance, who offered invaluable advice to improve the quality of this study. Friends and family have been a great source of encouragement. To them, and particularly to Tani, who, as always, brought order out of chaos and literally made the book possible, many, many thanks.