In an era of digital downloads and hit singles, the album is becoming a second-rate citizen in the world of music.
Albums are more than just a classic music format. They capture the artist at a moment in time in a way photographs never could.
Concept albums take this to the next level. They are the result of hundreds of hours of work between musicians, producers and engineers, all working towards one goal.
A great concept album becomes more powerful than the sum of its parts. To take one popular example, Pink Floyd's "Dark Side Of The Moon" will always, always sound better as an album than as individual singles.
That's why this week's question is:
What is the greatest concept album of all time?
Don't limit yourself to just progressive rock albums (though to be fair, that genre is ripe for the picking). The album could be from any genre, as long as it's intentionally tied together with an overarching theme or story. Maybe your choice is exclusively about the woes of drug addiction, or perhaps it's one of those brilliant classical versions of a metal record. If it doesn't seem like a clear concept album, feel free to justify your choice in the comments too.
Post your nominations in the comments, and remember to upvote other nominations you agree with. As usual, we'll stack up the results for a post this weekend.
Hit 'like' and 'tweet' to push the poll to your friends on social networks too - we think this could be one of the most definitive polls yet.