There is a line of withering criticism in Harold Schonberg's Lives of the Great Composers that has been scarred into my memory. Short and pungent, Schonberg's line writes off the entire twentieth century musical movement of minimalism—the movement that gave us Philip Glass and John Adams—as little more than (*gasp*) a "kind of baby music."
This line caused me instant grief and dismay, when I first read it. Because of course, I loved the first Philip Glass piece I ever heard, and have loved every other one since. How delightful!, I had thought. How palpably recognizable as music! If only all art compositions were this accessible. What an oasis we have here of simple repetitious pattern-making, after the great desert of 20th century atonal, twelve-tonal whatnot.