Conversation so far:
Who was an opponent of Richard Wagner
Eduard Hanslick
any one else an opponent of Richard Wagner besides Hanslick
Charles-Valentin Alkan
who supported Richard Wagner?
Wagner's followers (known as Wagnerians or Wagnerites) have formed many societies dedicated to Wagner's life and work
was brahms one of wagner's competitors
For a time, German musical life divided into two factions, supporters of Wagner and supporters of Johannes Brahms;

Question: What kind of music did he make
Self-contained rewrite: What kind of music did Richard Wagner make