If you’d like a remarkable example of the genius of Leonard Bernstein, I recommend that you listen – or listen again – to the song “Cool,” from West Side Story. Bernstein needed a song for the character Riff to sing to build up the tension before the gang fight between the Jets and the Sharks. If I told you his solution was to take Baroque counterpoint – a fugue, to be precise – the syncopated rhythms of jazz, and the atonal twelve-tone technique of Arnold Schoenberg… and to mix them all