Young is generally recognized as the first minimalist composer, and one of the four most celebrated leaders of the minimalist school, along with Terry Riley, Steve Reich and Philip Glass, despite having little in common formally with Glass or Reich.
His works have been included among the most important and radical post-World War II avant-garde, experimental, or drone music. Both his proto-Fluxus and "minimal" compositions question the nature and definition of music and often stress elements of performance art.
From Wikipedia
