Popular music of the last 50 years has failed to keep in step with advances in musical theater, namely Stephen Sondheim. But the two have grown apart so that popular music is based more than ever on a rhythmic grid that is irrelevant in musical theater. In popular music, words matter less and less. Especially now that it's so international, the fewer words the better. While theater music becomes more and more confined to a few blocks in midtown.Collection: Block