Modern classical music is music written in the 20th century and beyond. Although much of it draws heavily on earlier forms, modern composers also experimented with rejection of long-held ideas; notably, Arnold Schoenberg questioned the traditional notions of harmony with his twelve-tone system[?], and John Cage questioned the very definition of music with his use of chance and found sounds.
... black-ringed. All of this only encouraged the development of shocking dance styles such as the Charleston, the Shimmy[?], and the Black Bottom[?].
Despite all the ...