Formation and early days (1968–1969)

Following the breakup of their previous band Mythology in 1968, guitarist Tony Iommi and drummer Bill Ward sought to form a heavy blues band in Aston, Birmingham. The group enlisted bassist Geezer Butler and vocalist Ozzy Osbourne, who had played together in a band called Rare Breed, Osbourne having placed an advertisement in a local music shop: "Ozzy Zig requires gig- has own PA".[5] The new group was initially named The Polka Tulk Blues Company, after an Indian clothes emporium, and also featured slide guitarist Jimmy Phillips and saxophonist Alan "Aker" Clarke. After shortening the name to Polka Tulk, the band changed their name to Earth, and continued as a four-piece without Phillips and Clarke.[6][7]
Earth played club shows in England, Denmark, and Germany; their set-list consisted of cover songs by Jimi Hendrix, Blue Cheer, and Cream, as well as lengthy improvised blues jams. In December 1968, Iommi abruptly left Earth to join Jethro Tull.[8] Although his stint with the band would be short-lived, Iommi made an appearance with Jethro Tull on the The Rolling Stones Rock and Roll Circus TV show. Unsatisfied with the direction of Jethro Tull, Iommi returned to Earth in January 1969. "It just wasn't right, so I left", Iommi said. "At first I thought Tull were great, but I didn't much go for having a leader in the band, which was Ian Anderson's way. When I came back from Tull, I came back with a new attitude altogether. They taught me that to get on you got to work for it."[9]
While playing shows in England in 1969, the band discovered they were being mistaken for another English group named Earth, and decided to change their name again. A movie theatre across the street from the band's rehearsal room was showing the 1963 Boris Karloff horror film Black Sabbath. While watching people line up to see the film, Butler noted that it was "strange that people spend so much money to see scary movies".[10] Following that, Osbourne wrote the lyrics for a song called "Black Sabbath," which was inspired by the work of occult writer Dennis Wheatley,[11][12] along with a vision that Butler had of a black-hooded figure standing at the foot of his bed.[13] Making use of the musical tritone, also known as "The Devil's Interval",[14] the song's ominous sound and dark lyrics pushed the band in a darker direction,[15][16] a stark contrast to the popular music of the late 1960s, which was dominated by flower power, folk music, and hippie culture. Inspired by the new sound, the band changed their name to Black Sabbath in August 1969,[17] and made the decision to focus on writing similar material, in an attempt to create the musical equivalent of horror films.

Black Sabbath

Black Sabbath are a British rock band, formed in Birmingham in 1968 by Ozzy Osbourne (lead vocals), Tony Iommi (guitar), Geezer Butler (bass), and Bill Ward (drums and percussion). The band has since experienced multiple lineup changes, with a total of twenty-two former members. Originally formed as a heavy blues-rock band named Earth, the band began incorporating occult- and horror-inspired lyrics with tuned-down guitars, changing their name to Black Sabbath and achieving multiple gold and platinum records in the 1970s. As one of the first and most influential heavy metal bands of all time,[1] Black Sabbath helped define the genre with releases such as 1970's quadruple-platinum Paranoid.[2] They were ranked by MTV as the "Greatest Metal Band" of all time,[3] and have sold over fifteen million records in the United States alone.[4]
Vocalist Ozzy Osbourne's drinking led to his firing from the band in 1979 and was replaced by former Rainbow vocalist Ronnie James Dio. After a few albums with Dio's vocals and his songwriting collaborations, Black Sabbath would see a revolving lineup in the 1980s and 1990s that included vocalists Ian Gillan, Glenn Hughes, Ray Gillen and Tony Martin. In 1992, Iommi and Butler rejoined Dio and drummer Vinny Appice to record Dehumanizer, an album which stands to be Black Sabbath's heaviest album to date. The original lineup reunited with Osbourne in 1997 and released a live album, Reunion. The early/mid 1980s line-up featuring Iommi, Butler, Dio, and Appice reformed in 2006 under the title, Heaven & Hell.