My thanks to all those who cooperated in the writing of this book, many of whom were kind enough to endure repeated interviews, and to read and correct one or more drafts of the chapters in which they appear. In addition, I'd like to thank several others who provided moral support, inspiration, ideas, and sources: Mark Collier, Doug Colligan, David M. Evans, Gerald Feinberg, David R. Forrest, Martin Gardner, Charles Griswold, Fred Hapgood, Steven G. Krantz, Allen J. Lopp, Michael A. G. Michaud, Roger J. Musser, Robert Nozick, Jim Oberg, Christine Peterson, Stanley Schmidt, and Steven Weinberg.
I owe a great personal debt to my wife, Pamela Regis, for her long indulgence over the duration of this work, for several ideas and insights, many good discussions, and -- not least -- one chapter title.
Profoundest thanks, finally, to my editor, Bill Patrick, who got me to thinking about the project in the first place, provided fine counsel from beginning to end, and (as before) saved me from many egregious misjudgments and stupidities during the course of it. For his gentle and patient guidance through some especially bad moments, I cannot thank him enough.