Tonality, n. In Western music, a historiographical application of chronological snobbery, arising from the decision by a few men to deify three composers from Vienna, after their deaths, around the turn of the 19th century, whose music they believed to be structurally defined by two ideals living somewhere in the upper west side of Plato’s heaven called “tonic” and “dominant,” and, in so deifying, to define all music with respect to these three dead composers.
All music before this time, then, came to have something of a preludial function—an improvised, sometimes ill-thought, formless groping for tonicization, with one particular German composer of the early 18th century as a final, grand dominant chord that at last resolved in these three Viennese composers. All music after this time, however, had a slightly more ambiguous historical nature. While tonality was implicitly adopted by everyone, it gave rise to two distinct approaches, one which defined itself by manifesting the ideals similarly to the original three, the Classical, and the other, the Romantic, by deviating from the manifestations but still maintaining those ideals. And the dialectic between the Classical and the Romantic shall continue forever and ever, amen.