Webern's music was among the most radical of its milieu, both in its concision and in its rigorous and resolute apprehension of twelve-tone technique. His innovations in schematic organization of pitch, rhythm, register, timbre, dynamics, articulation, and melodic contour; his eagerness to redefine imitative contrapuntal techniques such as canon and fugue; and his inclination toward athematicism, abstraction, and lyricism all greatly informed and oriented intra- and post-war European, typically serial or avant-garde composers such as Olivier Messiaen, Pierre Boulez, Karlheinz Stockhausen, Luigi Nono, Bruno Maderna, Henri Pousseur, and György Ligeti. In the United States, meanwhile, his music attracted the interest of Elliott Carter, whose critical ambivalence was marked by a certain enthusiasm nonetheless; Milton Babbitt, who ultimately derived more inspiration from Schoenberg's twelve-tone practice than that of Webern; and Igor Stravinsky, to whom it was very fruitfully reintroduced by Robert Craft.