Sentence:  His various aesthetic postulates remain as landmarks of a house divided against itself : Supra Expressionism , Neo Paganism , Neo Classicism , Neo Romanticism , Neo Jazz , Neo Ecclesiasticism , Neo Popularism , and most recently , Post <WSD>Serialism</WSD> - all competing with each other within one composer ! 
Meaning of the word marked with <WSD> tags:  20th century music that uses a definite order of notes as a thematic basis for a musical composition