A very interesting article by Dominic Green in the Weekly Standard. "John Coltrane and the End of Jazz" Mr. Green is an amazing writer and is quite knowledgable about some of the more technical aspects of music. Highly recommended for Jazz enthusiasts.
Some quotes: "The 20th century saw the triumph of capitalism and the musical format of the market economy was the quartet." "A quartet is the cheapest way to mimic an orchestra's range. Ringo plays the rhythm, Paula hold down the bass, John adds the chords and George does the decoration." and, later, "Alice Coltrane is the Yoko Ono of Jazz." Wow!