Presidential addresses to professional societies are a special kind of presentation. Undoubtedly each of us has his or her own set of categories for them: the lofty pronouncement upon the current professional scene, the prescription of a new direction for the discipline, an analysis of presuppositions prevailing in the field, and, of course, a review of and reflections upon developments in the course of the incumbent's professional years. Whether this particular typology of addresses, that is, this general classification system, accords with yours is not the point at issue. Rather, I wish to stress the moment of uncertainty which is experienced, inevitably, as one sets about the task of composing his or her contribution under the constraints of office. Quite frankly, at first I had thought to turn this problem to advantage by offering as the substance of my presentation a critical review of those presidential addresses which have graced the Society through its venerable history. This seemed to be a way that an office-holder might serve the Society in a properly historical fashion. Of course I foresaw difficulties. Should I stop analysis at a discreet distance, shall we say in 1950? Or ought I pass over the addresses of those predecessors who are still active members of the Society, especially if they might be in attendance? Such practical considerations were finally less important in dissuading me from taking this course, however, than the advice of good friends and colleagues: “Build upon your current research interests; it will be a more appropriate presentation.”