Taken from "Classic Albums:Pink Floyd -- The Making of The Dark Side of the Moon"."Us and Them" is a song by English progressive rock band Pink Floyd on their 1973 album The Dark Side of the Moon.The music was written by Richard Wright and lyrics by Roger Waters and it is sung by David Gilmour, with harmonies by Wright. The song is 7 minutes, 51 seconds in length, making it the longest on the album.