Us and Them is a song from English psychedelic / progressive rock band Pink Floyd's 1973 album, Dark Side of the Moon. It was written by Richard Wright and Roger Waters and sung by David Gilmour (harmonies by Wright). It is 7 minutes, 51 seconds in length, making it the longest song on the album.
It deals with ethnocentrism, conflict and the belief that a person's self is "always in the right"
It is rather quiet in tone…
Us (us, us, us, us) and them (them, them, them, them)
And after all we're only ordinary men
And you (you, you, you)