Why he should be remembered?

John Milton Cage Jr. (September 5, 1912 – August 12, 1992) was an American composer, music theorist, writer, and artist. 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 American composers of the 20th century.[1][2][3][4] He was also instrumental in the development of modern dance, mostly through his association with choreographer Merce Cunningham, who was also Cage's romantic partner for most of their lives.
 His achives:
 The archive of the John Cage Trust is held at Bard College in upstate New York.[127]
The John Cage Music Manuscript Collection held by the Music Division of The New York Public Library for the Performing Arts contains most of the composer's musical manuscripts, including sketches, worksheets, realizations, and unfinished works.
The John Cage Papers are held in the Special Collections and Archives department of Wesleyan University's Olin Library in Middletown, Connecticut. They contain manuscripts, interviews, fan mail, and ephemera. Other material includes clippings, gallery and exhibition catalogs, a collection of Cage's books and serials, posters, objects, exhibition and literary announcement postcards, and brochures from conferences and other organizations
The John Cage Collection at Northwestern University in Illinois contains the composer's correspondence, ephemera, and the Notations collection.
（By wikipedia http://en.wikipedia.org/wiki/John_Cage#Reception_and_influence)
  After researching his resource, I found that he described his music as "purposeless play". But meanwhile he emphasized that this kind of performance is an affirmation of life.
  On the other hands, he also had a special identity was that he was a mushroom-lover. He founded the New York Mycological Society with three friends. It doesn't sound like a composer and musician would like. But I think everything can happen to him because he is full of wonder and his story is fascinating to attract me to dig more.