Arnold Franz Walter Schönberg (September 13, 1874, Vienna, Austria – July 13, 1951, Los Angeles, USA) was an Austrian composer and music teacher. He was one of the early experimenters to explore the idea of atonality. Schoenberg is especially known for his concept of "12-note" or "serial" music, (a form that Charles Ives had earlier experimented with) and used it in most of his later works. At the end of World War I he taught in Vienna and Berlin, until exiled by the Nazi government in 1933. He settled in California in 1934, having anglicised the spelling of his name, started teaching at UCLA in 1936. and took US nationality in 1941.
He taught John Cage and later described him as "not a composer, but an inventor- of genius"