In music, modernism is an aesthetic stance underlying the period of change and development in musical language that occurred around the turn of the 20th century, a period of diverse reactions in challenging and reinterpreting older categories of music, innovations that led to new ways of organizing and approaching harmonic, melodic, sonic, and rhythmic aspects of music, and changes in aesthetic worldviews in close relation to the larger identifiable period of modernism in the arts of the time. The operative word most associated with it is "innovation". Its leading feature is a "linguistic plurality", which is to say that no one music genre ever assumed a dominant position. Examples include the celebration of Arnold Schoenberg's rejection of tonality in chromatic post-tonal and twelve-tone works and Igor Stravinsky's move away from symmetrical rhythm. Authorities typically regard musical modernism as an historical period or era extending from about 1890 to 1930, and apply the term "postmodernism" to the period or era after 1930. For the musicologist Carl Dahlhaus the purest form was over by 1910, but other historians consider modernism to end with one or the other of the two world wars. Definitions Carl Dahlhaus describes modernism as: an obvious point of historical discontinuity ... The "breakthrough" of Mahler, Strauss, and Debussy implies a profound historical transformation ... If we were to search for a name to convey the breakaway mood of the 1890s (a mood symbolized musically by the opening bars of Strauss's Don Juan) but without imposing a fictitious unity of style on the age, we could do worse than revert to Hermann Bahr's term "modernism" and speak of a stylistically open-ended "modernist music" extending (with some latitude) from 1890 to the beginnings of our own twentieth-century modern music in 1910. Eero Tarasti defines musical modernism directly in terms of "the dissolution of the traditional tonality and transformation of the very foundations of tonal language, searching for new models in atonalism, polytonalism or other forms of altered tonality", which took place around the turn of the century. Daniel Albright proposes a definition of musical modernism as, "a testing of the limits of aesthetic construction" and presents the following modernist techniques or styles: Conductor and scholar Leon Botstein describes musical modernism as "...a consequence of the fundamental conviction among successive generations of composers since 1900 that the means of musical expression in the 20th century must be adequate to the unique