The Unforgettable Fire is, quite simply, the single best album ever made. In one sense, it is a concept album, but not in terms of a story but in terms of a concept of atmospheres. While the Boy era is punkish, the Achtung era is rocking, etc., the UF era is one of beautiful atmospheres and soundscapes. The album has an ethereal, timeless quality with songs from the seductive Promenade to the epic Bad, anthemic Pride, and bleak, haunting Wire. There may only be ten tracks, but the album has great diversity, from a perfectly crafted pop hit (Pride) to the band messing around in the studio (4th Of July). The best part is how well the album flows - I can't fault it. I am particularly keen on the flow of tracks 4-7. The Unforgettable Fire is an eerie, meticulously crafted number, then it fades out into the beautiful and seductive notes of Promenade, which softly merges into the weird and intriguing sounds of 4th Of July, providing the perfect lead-in to the zenith of minimalism that is Bad.
The Unforgettable Fire has this amazing quality throughout the album to conjure up vivid mental landscapes in the listener's mind. The only album that I think can rival UF in this field is The Joshua Tree - other albums may have individual songs that conjure up landscapes (can you say Heartland?) but UF brings forth varied landscapes in each song. It really is an amazing piece of work - and to think it followed War! The War Tour hadn't even finished a year previously when the UF album came out. People talk about the RAH --> Achtung change as if it's something major, but I firmly believe the swifter change in 1983-84 was far greater, heading from post-punk/aggressive political rock straight to a mastery to subtle, beautiful atmospherics.
I do not believe U2 have ever topped The Unforgettable Fire and they would be hard-pressed to do it. I don't think anyone could top this album.