Since this is quite assuredly my very last of many books it is time for me to acknowledge my eternal indebtedness to my wife and partner Mari Sorri. Over the past forty years Mari has been my faithful cohort in nearly every aspect of my teaching and writing career. Not only has she made innumerable incidental suggestions to improve both my classroom and scholarship endeavors, but she has as well provided significant insight into the content of my intellectual efforts. With both patience and humor Mari has contributed substantially to all of my various undertakings. Clearly there are no words with which to adequately express my deep gratitude and happiness over this arrangement. I can only trust that she has some inkling of my heartfelt appreciation. Enriching love is its own reward. How lucky can a guy get? Thank you Mari!