His writings covered a wide range of topics, including autobiography, politics, philosophy, and detailed analyses of his own operas. Wagner planned for a collected edition of his publications as early as 1865; he believed that such an edition would help the world understand his intellectual development and artistic aims. The first such edition was published between 1871 and 1883, but was doctored to suppress or alter articles that were an embarrassment to him (e.g. those praising Meyerbeer), or by altering dates on some articles to reinforce Wagner's own account of his progress. Wagner's autobiography Mein Leben was originally published for close friends only in a very small edition (15–18 copies per volume) in four volumes between 1870 and 1880. The first public edition (with many passages suppressed by Cosima) appeared in 1911; the first attempt at a full edition (in German) appeared in 1963. There have been modern complete or partial editions of Wagner's writings, including a centennial edition in German edited by Dieter Borchmeyer (which, however, omitted the essay "Das Judenthum in der Musik" and Mein Leben). The English translations of Wagner's prose in eight volumes by William Ashton Ellis (1892–1899) are still in print and commonly used, despite their deficiencies. The first complete historical and critical edition of Wagner's prose works was launched in 2013 at the Institute for Music Research at the University of Würzburg; this will result in at least eight volumes of text and several volumes of commentary, totalling over 5,000 pages. It was originally anticipated that the project will be completed by 2030. A complete edition of Wagner's correspondence, estimated to amount to between 10,000 and 12,000 items, is under way under the supervision of the University of Würzburg. As of January 2021, 25 volumes have appeared, covering the period to 1873. Influence and legacy Influence on music Wagner's later musical style introduced new ideas in harmony, melodic process (leitmotif) and operatic structure. Notably from Tristan und Isolde onwards, he explored the limits of the traditional tonal system, which gave keys and chords their identity, pointing the way to atonality in the 20th century. Some music historians date the beginning of modern classical music to the first notes of Tristan, which include the so-called Tristan chord. Wagner inspired great devotion. For a long period, many composers were inclined to align themselves with or against Wagner's music. Anton Bruckner and Hugo Wolf were greatly indebted