Arnold Schoenberg was an Austrian-American composer, born in Vienna in 1874, who worked in Vienna and Berlin before emigrating to the United States in 1933 and settling in Los Angeles. A leading figure of musical modernism, his output spans orchestral works, chamber music, vocal and choral compositions, operas, and film scores, moving from late-Romantic beginnings through free atonality to his own twelve-tone method of composition. He died in Los Angeles in 1951 of heart failure.

Schoenberg revolutionized twentieth-century music through his development of the twelve-tone technique and his pioneering of atonality and musical expressionism, freeing composition from traditional tonal constraints. As founder of the Second Viennese School, whose members included his students Alban Berg and Anton Webern, he profoundly shaped subsequent generations of composers, including later serialists such as Milton Babbitt and Pierre Boulez, and remains a central figure in the history of modern classical music.

Sources:

• https://en.wikipedia.org/wiki/Arnold_Schoenberg