After suffering a bit of a sophomore slump with 1978's Give 'Em Enough Rope, the Clash returned with a vengeance on the classic London Calling. This exuberant and complex double album found the group delivering ambitious music with total energy and conviction, a mandate that is firmly laid down with the album-opening title track. The lyrics read like a call to order for all post-punk generation rockers, complete with couplets like "London calling to the imitation zone/Forget it, brother, you can go it alone." They also use imagery like "The ice age is coming/The sun's zooming in" to create an apocalyptic feel. However, the songwriters were clever enough to keep things from getting too overwrought by working in occasional witty moments like "London calling to the zombies of death/Quit holding out and draw another breath." The music behind these sentiments has a hypnotic sense of drive, foregoing the usual verse-chorus structure in favor of a circular melody that allows the lyrics to take center stage and utilizes a mesmerizing descending-note motif to underline the oft-repeated title phrase. The Clash's recording of "London Calling" cleverly crossbreeds anthemic hard rock with reggae by juxtaposing slashing, staccato guitar riffs with an undulating rhythm section beat as Strummer lays down a snarling vocal that delivers the lyrics with a combination of passion and fervor. All these elements made "London Calling" a witty but powerful manifesto for post-punk rock & roll and its thorough excellence makes it easy to wonder why critics and fans alike consider London Calling to be both the Clash's finest hour and one of the greatest rock albums of the 1980s.