Dabrowski's theory of positive disintegration redefines established psychological constructs, especially the construct of psychopathology. Current views of what constitutes disorders is so engrained in western cultures that they are seen, implicitly, as immutable. Any codification of what comprises psychiatric disorders or abnormality is a social construction, subject to change, as indicated by some changes in the DSM over the years. Dabrowski's theory questions the very foundation of the approach to psychopathology that existed in his time and is evident today. The critical message of the theory of positive disintegration is that what are deemed symptoms of mental disorder may be, instead, signs of personal growth. Dabrowski does not simply proclaim his position, he provides a coherent explanation for it. While Dabrowski addresses substantive issues of mental illness and mental health, most of the research literature purporting to investigate his theory dwells on one component of his theory: overexcitability. The essays in DYNAMISM, DEVELOPMENT AND DISPOSITIONS have a common aim: to draw attention to the fullness of the theory with the hope of encouraging researchers to move beyond their singular atomic focus. A word on the subtitle of the book is in order. Sal Mendaglio's essays honour a great theorist with a scholarly, not effusive, treatment of the theory of positive disintegration.