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.
... dangerous, some work, most are a harmless waste of money (plus a possible placebo effect).
Numerous diet programs use people's concern over their image, as a way to ...