Richard Wright introduces the song with harmonies on
Hammond organ and put a piano chordal backing and short piano solo afterwards on the arrangement. The tune was originally written on the piano by Wright for the film
Zabriskie Point in 1969 and was titled "The Violent Sequence". In its original demo form the song was instrumental, featuring only piano and bass. Director
Michelangelo Antonioni rejected it on the grounds that it was too unlike material such as "
Careful with That Axe, Eugene", which was the style of music he wanted to use. As Roger Waters recalls it in impersonation, Antonioni's response was: "It's beautiful but is a too sad, you know? It makes me think of
church". The song was then shelved until the making of
The Dark Side of the Moon. The lyrics of the song were written by Waters. They describe the senseless nature of
war and the ignorance of modern-day humans who have been taken over by
consumerism and
materialism. In an interview, Waters shared the significance of each verse: The verses have a unique, jazz-influenced
chord progression: Dsus2, D6add9 (or Esus2/D), Dminor major 7, and G/D. The tonic of D, alternating with the dominant, A, is sustained on bass guitar as a
pedal point throughout the verses. The D6 with an added 9th is not unlike an Esus2 with a D in the bass but because the bass line also provides the
fifth, it is more accurately described as a kind of D
chord. The
D minor chord with a major seventh is a rarity in 1970s rock music. There is also a secondary sequence, louder with thick vocal harmonies, with a progression of Bminor, Amajor, G
major seventh suspended second, commonly written as "Gmaj7sus2" (enharmonic to the
slash chord D/G), and Cmajor. This progression is played twice between each verse and is not unlike a
chorus, except that the lyrics are different with each repeat. In the middle, there is a break during which
roadie Roger "The Hat" Manifold speaks. It was re-released on the 2001 best of album,
Echoes: The Best of Pink Floyd, where it's the seventh track of the second disc. The ending of the song was edited in this version with the vocals from the last bar treated with heavy
delay and the music track muted entirely to avoid the seamless transition to "
Any Colour You Like" that occurs on
The Dark Side of the Moon. ==Spoken parts==