I wish to express my appreciation to the many individuals who offered help and support during the writing of this book. Special thanks goes to Stephen Krupa, who offered an insightful critique of the work as well as enthusiasm and encouragement. Thanks also goes to Robert Barasch, Ph.D., who likewise was helpful with his comments and suggestions. I am also indebted to my two editors, Leonora Gibson at Wesleyan University Press, who offered direction and support at the outset of the project, and John Michel at Columbia University Press, who brought the project to fruition. Finally, I again express my appreciation to my wife, Veronica, who has been a constant source of encouragement throughout my career.