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It was this hierarchy—so central to Western cosmology for so long that, even today, a ten-year-old could intuitively get much of it right—that was challenged by the most famous compendium of all: Denis Diderot and Jean le Rond d’Alembert’s eighteen-thousand-page Encyclopédie. Published between 1751 and 1772, the Encyclopédie was sponsored by neither the Catholic Church nor the French monarchy and was covertly hostile to both. It was intended to secularize as well as to popularize knowledge, and it demonstrated those Enlightenment commitments most radically through its organizational scheme. Rather than being structured, as it were, God-down, with the whole world flowing forth from a divine creator, it was structured human-out, with the world divided according to the different ways in which the mind engages with it: “memory,” “reason,” and “imagination,” or what we might today call history, science and philosophy, and the arts. Like alphabetical order, which effectively democratizes topics by abolishing distinctions based on power and precedent in favor of subjecting them all to the same rule, this new structure had the effect of humbling even the most exalted subjects. In producing the Encyclopédie, Diderot did not look up to the heavens but out toward the future; his goal, he wrote, was “that our descendants, by becoming more learned, may become more virtuous and happier.”
It is to Diderot’s Encyclopédie that we owe every modern one, from the Britannica and the World Book to Encarta and Wikipedia. But we also owe to it many other kinds of projects designed to, in his words, “assemble all the knowledge scattered on the surface of the earth.” It introduced not only new ways to do so but new reasons—chief among them, the diffusion of information prized by an élite class into the culture at large. The Encyclopédie was both the cause and the effect of a profoundly Enlightenment conviction: that, for books about everything, the best possible audience was the Everyman.
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