Released in 1971 „The yes album“ is the first real progressive rock album of Yes. It was their make it or break it album, since their first two albums which goes more in the beat and psychedelic rock direction flopped and the chef of the label gave them a last ultimatum.
After Peter Banks left after the second album because of the strings on it, the found Steve Howe as a new guitar player who had a major influence in the change of the direction to the prog.
I have to say that I don´t like this. It have some moments, like the Led Zeppelin like Part in „I´ve seen all good people“ but overall this album is just unnecessary playing around while missing to mark highlights like Rush or Kansas do it.