John Cage performing "Water Walk" in January, 1960 on the popular TV show I've Got A Secret. John Milton Cage Jr. (September 5, 1912 – August 12, 1992) was an American composer, music theorist, artist, and philosopher. A pioneer of indeterminacy in music, electroacoustic music, and non-standard use of musical instruments, Cage was one of the leading figures of the post-war avant-garde. Critics have lauded him as one of the most influential composers of the 20th century. He was also instrumental