One of my favorite albums of all time. Forgetting the trite socialism mouthed in "Change The World", the sentiments are genuine and the instrumentalism is outstanding.
A very strange song off that album is "Here They Come", which is about UFO's. Very nice acoustic work in that one.
I liked how "Rock and Roll Music to the World" was a renunciation of that same socialism; unfortunately, it was also pretty much a career-ender for TYA.