Having won a scholarship to study at the recently established Studio for Electronic Music in Cologne, Cardew served as an assistant to Karlheinz Stockhausen from 1958 to 1960.
[4]In 1958, Cardew witnessed a series of concerts in Cologne by John Cage and David Tudor which had a considerable influence on him, leading him to abandon post-Schönbergian serial composition and develop the indeterminate and experimental scores for which he is best known.
He was particularly prominent in introducing the works of American experimental composers such as Morton Feldman, La Monte Young, Earle Brown, Christian Wolff, and Cage to an English audience during the early to mid sixties.
AMM had formed the previous year and included English jazz musicians Lou Gare, Eddie Prévost, Keith Rowe, and one of his first students at the Royal Academy Christopher Hobbs.
It was during this period that the question of art for whom was hotly debated within the context of the Orchestra, which Cardew came to see as elitist despite its numerous attempts to make socially accessible music.
The motion read: This branch deplores the publicity recently given to the activities and Nazi style gimmickry of a certain artiste and his idea that this country needs a right wing dictatorship.
[6] Tony Harris (2013) argues that Cardew's inclusion in Wikipedia or in other encyclopedias such as New Grove has the effect of taming his legacy as a composer and ignoring those aspects of his work other than those which fit with those of a contributor to the Western classical music canon.
Musician John Tilbury, in his book Cornelius Cardew—A Life Unfinished suggests that the possibility that Cardew was killed because of his prominent Marxist-Leninist involvement "cannot be ruled out".