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Back in the day, the most frequent source of argument was the epistemic gap that separated more old fashioned, empiricist historians such as myself from the purveyors of a fashionable form of nihilism called postmodernism. The "posties" liked to insist that history was not merely untenable as a discipline but really quite boring. My usual response was something to the effect of "physician, heal thyself" and to point out that their problem was that they viewed history in such a narrow light - a trait that, ironically, they shared with the most conservative members of the historical profession.
On the contrary, history is the most expansive and broadly encompassing of all scholarly disciplines. Whatever else it may be, history will always involve the study of the past, and there are therefore few matters that fall entirely outside its purview: the totality of the human experience is ripe for historical study. Historians can examine much more than politics and war: they can profit from reading the literature, listening to the music, and studying the art and architecture of the past, and it provides yet another avenue in which to explore the eternal questions of philosophy, science, and religion that serve as bridges between cultures and between bygone eras and our own. It would pose no difficulty for an historian to propose a plan of research that involved the study of 19th century biology; a biologist who was predisposed to study the history of the 19th century would have an uphill battle to fight for funding.
Small wonder, then, that history is one of very few academic disciplines that also has a huge lay following. One seldom meets amateur epidemiologists, and there are very few differential calculus "buffs", but history enthusiasts are everywhere to be found. True, there are many effective popularizations of science (anyone who has not read the late Stephen J. Gould really should) but science at the cutting edge is seldom accessible to non-specialists. By contrast, any interested lay reader can make her way through the latest history journals without much difficulty. Moreover, the casual reader of history has one supreme advantage over professional historians: he can read solely to satisfy his own curiosity about the past, and need not justify his preferences to hiring committees and funding agencies. To be sure, there is a decided preference in public tastes for military history, but the less sanguinary of mind can visit any good bookshop and discover works to satisfy any interest: from biographies of presidents to culinary history.
How stultifying by comparison is the way history is taught to young people - as a vast accumulation of immutable facts: names, dates, and places, to be committed to memory, allegedly for the purposes of producing better citizens - as if historians can claim to be better citizens than, say, dental hygienists. Were it up to the kind of people who run the dull and dour Dominion Institute, whose annual "history quiz" is nothing more than an exercise in trivial pursuit, there would be more rather than less of this sort of thing: nothing will satisfy such people until Canadians have memorized the "facts" of history - whether or not they understand them, apparently, is incidental.
Orwell's dystopia was terrifying in part because the state was able to manipulate history for its own purposes (much as the Dominion Institute would have history taught for the purposes of promoting Canadian nationalism) but Huxley's vision of totalitarianism was more frightening still, because it envisioned a society without a history at all. Fortunately, any argument about what history is, should be, or what purposes it serves, cannot definitively be resolved, for history is too expansive a discipline to be bounded within the confines of such concerns. Rather, good history, like good food, is a source of wonderment and delight in and of itself.