In April, 1971, Rolling Stone reviewed the début album by a band with a name better suited to a law firm: Emerson, Lake & Palmer. The reviewer liked what he heard, although he couldn’t quite define it. “I suppose that your local newspaper might call it ‘jazz-influenced classical-rock,’ ” he wrote. In fact, a term was being adopted for this hybrid of highbrow and lowbrow. People called it progressive rock, or prog rock: a genre intent on proving that rock and roll didn’t have to be simple and silly—it could be complicated and silly instead. In the early nineteen-seventies, E.L.P., alongside several more or less like-minded British groups—King Crimson, Yes, and Genesis, as well as Jethro Tull and Pink Floyd—went, in the space of a few years, from curiosities to rock stars. This was especially true in America, where arenas filled up with crowds shouting for more, which was precisely what these bands were designed to deliver. The prog-rock pioneers embraced extravagance: odd instruments and fantastical lyrics, complex compositions and abstruse concept albums, flashy solos and flashier live shows. Concertgoers could savor a new electronic keyboard called a Mellotron, a singer dressed as a batlike alien commander, an allusion to a John Keats poem, and a philosophical allegory about humankind’s demise—all in a single song (“Watcher of the Skies,” by Genesis). In place of a guitarist, E.L.P. had Keith Emerson, a keyboard virtuoso who liked to wrestle with his customized Hammond organ onstage, and didn’t always win: during one particularly energetic performance, he was pinned beneath the massive instrument, and had to be rescued by roadies. Perhaps this, too, was an allegory.

Most of these musicians took seriously the “progressive” in “progressive rock,” and believed that they were helping to hurry along an ineluctable process: the development of rock music into what Jon Anderson, of Yes, once called “a higher art form.” Even more than most musicians, the prog rockers aimed for immortality. “We want our albums to last,” Robert Fripp, the austere guitar scientist behind King Crimson, said. In a literal sense, he got his wish: although the progressive-rock boom was effectively over by the end of the seventies, it left behind a vast quantity of surplus LPs, which filled the bins in used-record stores for decades. (Many people who have never heard this music would nonetheless recognize some of the album covers.) Progressive rock was repudiated by what came next: disco, punk, and the disco-punk genre known as New Wave. Unlike prog rock, this music was, respectively, danceable, concise, and catchy. In the story of popular music, as conventionally told, progressive rock was at best a dead end, and at worst an embarrassment, and a warning to future musical generations: don’t get carried away.

In place of a guitarist, Emerson, Lake & Palmer had Keith Emerson, a keyboard virtuoso who liked to wrestle with his Hammond organ onstage, and didn’t always win: during one performance, he was pinned beneath the massive instrument, and had to be rescued by roadies. Photograph by Jorgen Angel / Redferns / Getty

The genre’s bad reputation has been remarkably durable, even though its musical legacy keeps growing. Twenty years ago, Radiohead released “OK Computer,” a landmark album that was profoundly prog: grand and dystopian, with a lead single that was more than six minutes long. But when a reporter asked one of the members whether Radiohead had been influenced by Genesis and Pink Floyd, the answer was swift and categorical: “No. We all hate progressive rock music.”

It is common to read about some band that worked in obscurity, only to be discovered decades later. In the case of progressive rock, the sequence has unfolded in reverse: these bands were once celebrated, and then people began to reconsider. The collapse of prog helped reaffirm the dominant narrative of rock and roll: that pretension was the enemy; that virtuosity could be an impediment to honest self-expression; that “self-taught” was generally preferable to “classically trained.”

In the past twenty years, though, a number of critics and historians have argued that prog rock was more interesting and more thoughtful than the caricature would suggest. The latest is David Weigel, a savvy political reporter for the Washington Post who also happens to be an unabashed fan—or, more accurately, a semi-abashed fan. His new history of prog rock is called “The Show That Never Ends,” and it begins with its author embarking on a cruise for fans, starring some of the great prog-rock bands of yore, or what remains of them. “We are the most uncool people in Miami,” Weigel writes, “and we can hardly control our bliss.”

Almost no one hated progressive rock as much, or as memorably, as Lester Bangs, the dyspeptic critic who saw himself as a rock-and-roll warrior, doing battle against the forces of fussiness and phoniness. In 1974, he took in an E.L.P. performance and came away appalled by the arsenal of instruments (including “two Arthurian-table-sized gongs” and “the world’s first synthesized drum kits”), by Emerson’s preening performance, and by the band’s apparent determination to smarten up rock and roll by borrowing from more respectable sources. E.L.P. had reached the Top Ten, in both Britain and America, with a live album based on its bombastic rendition of Mussorgsky’s “Pictures at an Exhibition.” Bangs wanted to believe that the band members thought of themselves as vandals, gleefully desecrating the classics. Instead, Carl Palmer, the drummer, told him, “We hope, if anything, we’re encouraging the kids to listen to music that has more quality”—and “quality” was precisely the quality that Bangs loathed. He reported that the members of E.L.P. were soulless sellouts, participating in “the insidious befoulment of all that was gutter pure in rock.” Robert Christgau, the self-proclaimed “dean of American rock critics,” was, if anything, more dismissive: “These guys are as stupid as their most pretentious fans.”

“Would you prefer me to hover over you silently or awkwardly try to make small talk?” Facebook

Twitter

Email

Shopping

The story of this reviled genre starts, though, with the most acclaimed popular music ever made. “If you don’t like progressive rock, blame it on the Beatles,” a philosophy professor named Bill Martin wrote, in his 1998 book, “Listening to the Future,” a wonderfully argumentative defense of the genre. Martin is, in his own estimation, “somewhat Marxist,” and he saw progressive rock as an “emancipatory and utopian” movement—not a betrayal of the sixties counterculture but an extension of it. Martin identified a musical “turning point” in 1966 and 1967, when the Beach Boys released “Pet Sounds” and the Beatles released “Sgt. Pepper’s Lonely Hearts Club Band,” which together inspired a generation of bands to create albums that were more unified in theme but more diverse in sound. Using orchestration and studio trickery, these albums summoned the immersive pleasure of watching a movie, rather than the kicky thrill of listening to the radio.