The groundwork for post-metal was laid in the 1980s and early 1990s by various artists combining heavy metal and punk rock sounds with an "avant-garde sensibility", such as the Melvins (particularly on 1991's Bullhead), the Flying Luttenbachers, Justin Broadrick of Napalm Death and Godflesh, Swans, Gore, Last Exit, Glenn Branca, Rollins Band, and Fugazi. Helmet's albums Meantime (1992) and Betty (1994) were also significant, while Tool's music was described as post-metal as early as 1993. Many of these artists emerged from hardcore punk and post-punk circles but their combination of sonic violence with experimentation and eclecticism made them difficult to categorize under any one genre.
Emergence in the 1990s
The term post-rock was coined in 1994 and soon used to describe a diverse group of bands that shared "a penchant for drifting melodies and the desire to expand beyond established rock boundaries". As this movement swelled, bands from post-hardcore and experimental backgrounds began to incorporate its tendencies of "ambience, offbeat experimentation, downcast melodies and psychedelia" into metal. The two genres further converged through the influence of post-rock bands such as Mogwai, Godspeed You! Black Emperor, and Lift to Experience who shared metal's emphasis on loudness.
have been credited with inventing the genre through their experimental
, spiritually intense work.
Neurosis' third album Souls at Zero and Godflesh's sophomore album Pure, both released in 1992, are often retrospectively considered the first post-metal records. Godflesh had already pioneered "sluggish and tortured" industrial metal of their 1989 debut Streetcleaner, but Pure showcased "more expansive structures and long stretches of billowing noise", inspiring a number of subsequent bands to combine metal with "layered washes of sound". Neurosis on the other hand were a hardcore band who embraced doom metal, post-punk and industrial influences, experimenting with texture and dynamics. They have since become "worshipped for their pioneering post-metal efforts and unwavering dedication to expanding their artistic boundaries." In 2010, guitarist Steve Von Till stated:
We always knew there was something deep to Neurosis's music, but ... I think Souls at Zero was when the music became something else. It was taking that material out on the road and losing ourself in the trance states induced by playing hypnotic, super-heavy loud music that we really figured out how to surrender to it. Then we said, OK – this is going to take us to where we wanna go: somewhere deeper, somewhere more emotional, somewhere elemental.
The band's 1996 fifth album Through Silver in Blood was credited by Terrorizer with "effectively invent[ing] the post-metal genre" and named the best post-metal album of all time by Fact. The fluctuating 12-minute song "Purify" has been described as the album's "signature track". Neurosis' work has also contributed the development of doom metal, sludge metal, and drone metal, and these genres have been associated with post-metal since. Similarly, drone metal pioneers Earth have been significant to post-metal ever since their 1991 debut release .
Furthermore, Fact writer Robin Jahdi highlights the late 1990s noisecore of bands such as Botch, Kiss It Goodbye, the Dillinger Escape Plan and Coalesce, who merged brutal metallic hardcore with jazz into fast-and-complex compositions, as a fundamental influence on post-metal. Writing for Bandcamp Daily, Jon Wiederhorn also noted the significance of Botch and Cave In, while Converge have been connected to post-metal through their longer songs since the closing track of their seminal 2001 album Jane Doe. According to Jahdi, the genre emerged as "those young intellectuals decided to slow it down" and labels such as Relapse Records and Hydra Head Records began releasing "slower, more bass-heavy and abstract" music more akin to post-rock.
Development in the 2000s
Hydra Head Records had been established in 1993 by Aaron Turner. In 1997, Turner co-founded Isis, a band which became central to an increasingly recognizable post-metal movement. In particular, their 2002 sophomore album Oceanic – which showcased "buzzing washes of multilayered sound that ebbed and flowed in intensity", combining the "barbed guitars" and "shouted vocals" of post-hardcore with "meandering, psychedelic progressions" – has become regarded as a classic of the genre. At the same time, Hydra Head signed further prominent bands, releasing the early records of Pelican and Jesu. While Pelican are an instrumental quartet inspired as much by Neurosis and Godflesh as by Mogwai, Jesu was formed by Justin Broadrick after the breakup of Godflesh to explore "ambient guitar compositions", embracing shoegazing and slowcore influences.
Alongside shoegazing, black metal began to transform post-metal as it "spread beyond Scandinavia to infect the global underground". Many bands employ the "speed and ferocity" of black metal in "contrast to slower, more ethereal compositions". This approach was pioneered by Agalloch, who formed in 1995 and also employed elements of doom metal, progressive rock, folk music, and post-hardcore. Wolves in the Throne Room, who became a significant act for American black metal by the release of their 2007 sophomore album Two Hunters, were also inspired by Neurosis in combining "ambience and violence" to craft deeply melancholic music.
While all post-metal pioneers except Broadrick are American, the genre soon spread internationally. In particular, the Japanese band Boris, formed in 1992, "have always embraced the spirit and vitality of the vibrant movement" and some of their works, such as the 2005 albums Dronevil and Pink, have become influential to it. Boris often employ elements of drone music and have collaborated with prominent drone metal band Sunn O))), who have also been associated with post-metal. Several European bands also gained prominence within the genre, including Cult of Luna from Sweden, whose sound is indebted to Isis' Oceanic, Amenra from Belgium, who signed to Neurosis' label Neurot Recordings and rival their predecessors in sheer spiritual intensity, and Year of No Light from France, who have transitioned from a sludge-oriented sound to monumental instrumental compositions, "beautifully layered, but still dark and heavy".
Another prominent instrumental band, Russian Circles, was also strongly influenced by Oceanic. By contrast, True Widow, whose sound is rooted as much in 1990s indie rock and psychedelic rock as in doom metal, offer a distinctive take on post-metal, most impactfully on the 2013's Circumambulation, by employing "male/female vocal interplay" and showcasing "vulnerability and restraint". Meanwhile, the Melvins had made a direct mark on the sound they themselves inspired with the 2004 album Pigs of the Roman Empire, a collaboration with dark ambient composer Lustmord.
Gradually, post-metal as a genre has achieved major critical acclaim. This was reinforced by the "widely publicized" success of Deafheaven, whose sophomore album Sunbather became one of the most celebrated releases of 2013. The band's successful fusion of caustic black metal with blissfull shoegazing in the vein of My Bloody Valentine and Slowdive, though preceded by the French musician Neige of Alcest, was nicknamed blackgaze and met with disdain from fans of conventional extreme metal. It has also inspired a wave of bands such as Ghost Bath, who often use undistorted guitar melodies to develop unsettling atmospheres, and Austria's Harakiri for the Sky, whose despairing sound melds black metal and post-hardcore.