“The moral and political track record of modernist artists is nothing to be proud of. Some were despicable in the conduct of their personal lives, and many embraced facism or Stalinism. The modernist composer Karlheinz Stockhausen described the September 11, 2001 terrorist attacks as “the greatest work of art imaginable for the whole cosmos”, and added, enviously, that “artists, too, sometimes go beyond the limits of what is feasible and conceivable, so that we wake up, and that we open ourselves to another world.” Nor is the theory of postmodernism especially progressive. A denial of objective reality is no friend to moral progress, because it prevents one from saying, for example, that slavery or the Holocaust really took place.”
– Steven Pinker, The Blank Slate, page 416.