A seminal work in the development of the American jazz avant garde, and one of the most "out" records that Kenton (or Capitol) ever released! The whole album is based around two startling compositions by Robert Graettinger – "This Modern World" and "City Of Glass" – and both are chilling longform works in a distinctly modern idiom. The pieces have been cited often in the development of American avant garde jazz, and they represent a postwar crossroads of ideas that incorporates atonal composition and bop-oriented approaches to instrumentation.