Blues rock in the context of Proto-metal

Heavy metal (or simply metal) is a genre of rock music that developed in the late 1960s and early 1970s, largely in the United Kingdom and United States. With roots in blues rock, psychedelic rock and acid rock, heavy metal bands developed a thick, monumental sound characterized by distorted guitars, extended guitar solos, emphatic beats and loudness.

In 1968, three of the genre's most famous pioneers – British bands Led Zeppelin, Black Sabbath and Deep Purple – were founded. Though they came to attract wide audiences, they were often derided by critics. Several American bands modified heavy metal into more accessible forms during the 1970s: the raw, sleazy sound and shock rock of Alice Cooper and Kiss; the blues-rooted rock of Aerosmith; and the flashy guitar leads and party rock of Van Halen. During the mid-1970s, Judas Priest helped spur the genre's evolution by discarding much of its blues influence, while Motörhead introduced a punk rock sensibility and an increasing emphasis on speed. Beginning in the late 1970s, bands in the new wave of British heavy metal such as Iron Maiden and Saxon followed in a similar vein. By the end of the decade, heavy metal fans became known as "metalheads" or "headbangers". The lyrics of some metal genres became associated with aggression and machismo, an issue that has at times led to accusations of misogyny.

Hard rock or heavy rock is a heavier subgenre of rock music typified by aggressive vocals and distorted electric guitars. Hard rock began in the mid-1960s with the garage, psychedelic and blues rock movements. Some of the earliest hard rock music was produced by the Kinks, the Who, the Beatles, the Rolling Stones, Cream, Vanilla Fudge, and the Jimi Hendrix Experience. In the late 1960s, bands such as Blue Cheer, the Jeff Beck Group, Iron Butterfly, Led Zeppelin, Creedence Clearwater Revival, Golden Earring, Steppenwolf, Grand Funk Railroad, Free, and Deep Purple also produced hard rock.

The genre developed into a major form of popular music in the 1970s, with the Who, Led Zeppelin and Deep Purple being joined by Black Sabbath, Alice Cooper, Aerosmith, Kiss, Queen, AC/DC, Thin Lizzy and Van Halen. During the 1980s, some hard rock bands moved away from their hard rock roots and more towards pop rock. Established bands made a comeback in the mid-1980s and hard rock reached a commercial peak in the 1980s with glam metal bands such as Mötley Crüe, Bon Jovi and Def Leppard as well as the rawer sounds of Guns N' Roses which followed with great success in the later part of that decade.

MC5 (also known as the Motor City Five) was an American rock band formed in Lincoln Park, Michigan, in 1963. The classic lineup consisted of vocalist Rob Tyner, guitarists Wayne Kramer and Fred "Sonic" Smith, bassist Michael Davis, and drummer Dennis Thompson. MC5 were listed by Parade as one of the best rock bands of all time and by VH1 as one of the greatest hard rock artists of all time.The band's first three albums are regarded by many as staples of rock music, and their 1969 song "Kick Out the Jams" is widely covered.

"Crystallizing the counterculture movement at its most volatile and threatening", according to AllMusic critic Stephen Thomas Erlewine, MC5's leftist political ties and anti-establishment lyrics and music positioned them as emerging pioneers of the punk movement in the United States. Their loud, energetic style of back-to-basics rock and roll included elements of garage rock, hard rock, blues rock, and psychedelic rock. Rage Against the Machine guitarist Tom Morello described MC5 as having "basically invented punk rock."

Eric Patrick Clapton (born 30 March 1945) is an English rock and blues guitarist, singer, and songwriter. He is regarded as one of the most successful and influential guitarists in rock music. Clapton ranked second in Rolling Stone's list of the "100 Greatest Guitarists of All Time" and fourth in Gibson's "Top 50 Guitarists of All Time". He was named number five in Time magazine's list of "The 10 Best Electric Guitar Players" in 2009.

After playing in a number of different local bands, Clapton joined the Yardbirds from 1963 to 1965, and John Mayall & the Bluesbreakers from 1965 to 1966. After leaving Mayall, he formed the power trio Cream with drummer Ginger Baker and bassist/vocalist Jack Bruce, in which Clapton played sustained blues improvisations and "arty, blues-based psychedelic pop". After four successful albums, Cream broke up in November 1968. Clapton then formed the blues rock band Blind Faith with Baker, Steve Winwood, and Ric Grech, recording one album and performing on one tour before they broke up. Clapton then toured with Delaney & Bonnie and recorded his first solo album in 1970, before forming Derek and the Dominos with Bobby Whitlock, Carl Radle and Jim Gordon. Like Blind Faith, the band only lasted one album, Layla and Other Assorted Love Songs, which includes "Layla", one of Clapton's signature songs.

William Rory Gallagher (/ɡæləhər/ GAL-ə-hər; 2 March 1948 – 14 June 1995) was an Irish musician, singer, and songwriter. Regarded as "Ireland's first rock star", he is known for his virtuosic style of guitar playing and live performances. He has sometimes been referred to as "the greatest guitarist you've never heard of".

Gallagher gained international recognition in the late 1960s as the frontman and lead guitarist of the blues rock power trio Taste. Following the band's break-up in 1970, he launched a solo career and was voted Guitarist of the Year by Melody Maker magazine in 1972. Gallagher played over 2,000 concerts worldwide throughout his career, including many in Northern Ireland during the Troubles. He had global record sales exceeding 30 million.

Cream were a British rock supergroup formed in London in 1966. The group consisted of bassist Jack Bruce, guitarist Eric Clapton and drummer Ginger Baker. Bruce was the primary songwriter and vocalist, although Clapton and Baker contributed to songs. Formed by members of previously successful bands, they are widely considered to be the first so-called supergroup in rock history. Cream were highly regarded for the instrumental proficiency of each of their members.

During their brief three-year career, the band released four albums: Fresh Cream (1966), Disraeli Gears (1967), Wheels of Fire (1968), and Goodbye (1969). Beginning with Disraeli Gears, the band was joined in the studio by producer and multi-instrumentalist Felix Pappalardi. Their music spanned rock styles such as blues rock, psychedelia, and hard rock. Throughout their career, they sold more than 15 million records worldwide. The group's third album, Wheels of Fire (1968), is the first platinum-selling double album. They scored international hits with singles such as "Sunshine of Your Love" (1967) and "White Room" (1968).

Blue Cheer was an American rock band that initially performed and recorded in the late 1960s and early 1970s and was sporadically active until 2009. Based in San Francisco, Blue Cheer played in a psychedelic blues rock or acid rock style. They are also credited as being some of the earliest pioneers of heavy metal, with their cover of "Summertime Blues" sometimes cited as the first in the genre. They have also been noted as influential in the development of genres as disparate as stoner rock, experimental rock, and grunge.

Free were an English rock band formed in London in 1968 by Paul Rodgers (vocals), Paul Kossoff (guitar), Andy Fraser (bass, piano) and Simon Kirke (drums, percussion). They are best known for their hit songs "All Right Now" and "Wishing Well". Although renowned for their live performances and non-stop touring, their music did not sell well until their third studio album, Fire and Water (1970), which featured the hit "All Right Now". The song helped secure them a performance at the 1970 Isle of Wight Festival, where they played to an audience of 600,000 people. In the early 1970s they became one of the best-selling British blues rock groups; by the time they disbanded, they had sold more than 20 million records worldwide and had played in more than 700 arenas and festival concerts. "All Right Now" remains a staple of R&B and rock, and has entered ASCAP's "One Million" airplay singles club.

Fraser left the band in 1972 and formed Sharks. Free recorded one more album, Heartbreaker, before disbanding in 1973; Rodgers and Kirke went on to co-form the more successful rock supergroup Bad Company. Kossoff formed Back Street Crawler in 1973, but died from a pulmonary embolism at the age of 25 in 1976. Fraser died in 2015 at 62.

AC/DC are an Australian rock band formed in Sydney in 1973. Their music has been variously described as hard rock, blues rock and heavy metal, although the band calls it simply "rock and roll". They are cited as a formative influence on the new wave of British heavy metal bands. The band was inducted into the Rock and Roll Hall of Fame in 2003 and have sold over 200 million records worldwide, making them one of the best-selling artists of all time.

AC/DC were founded by brothers Angus (lead guitar) and Malcolm Young (rhythm guitar), with Colin Burgess (drums), Larry Van Kriedt (bass guitar) and Dave Evans (lead vocals). They underwent several line-up changes before releasing their Australasian-only debut album, High Voltage (1975). Membership stabilised after the release of Let There Be Rock (1977), with the Young brothers, Phil Rudd on drums, Cliff Williams on bass guitar and Bon Scott on lead vocals. Seven months after the release of Highway to Hell (1979), Scott died of alcohol poisoning and English singer Brian Johnson was then recruited as their new frontman. Their first album with Johnson, Back in Black (1980), dedicated to Scott's memory, became the second best-selling album of all time. Their eighth studio album, For Those About to Rock (1981), was their first album to reach number one on the Billboard 200. Rudd was fired partway through the Flick of the Switch sessions in 1983 and was replaced by Simon Wright, who was replaced by Chris Slade six years later.

John Brumwell Mayall OBE (29 November 1933 – 22 July 2024) was an English blues and rock musician, songwriter and producer. In the 1960s, he formed John Mayall & the Bluesbreakers, a band that has counted among its members some of the most famous blues and blues rock musicians of all-time. A singer, guitarist, harmonica player, and keyboardist, he had a career that spanned nearly seven decades, remaining an active musician until his death aged 90. Mayall has often been referred to as the "godfather of the British blues", and was inducted into the Rock and Roll Hall of Fame in the musical influence category in 2024.

Stephen Ray Vaughan (October 3, 1954 – August 27, 1990), also known abbreviated as SRV, was an American musician, best known as the guitarist and frontman of the blues rock trio Stevie Ray Vaughan and Double Trouble. Although his mainstream career spanned only seven years, he is considered one of the most influential musicians in the history of blues music, and one of the greatest guitarists of all time. He was the younger brother of guitarist Jimmie Vaughan.

Born and raised in Dallas, Vaughan began playing guitar at age seven, initially inspired by his brother Jimmie. In 1972, he dropped out of high school and moved to Austin, where he began to gain a following after playing gigs on the local club circuit. Vaughan joined forces with Tommy Shannon on bass and Chris Layton on drums as Double Trouble in 1978. The band established itself in the Austin music scene and soon became one of the most popular acts in Texas. They performed at the Montreux Jazz Festival in July 1982, where David Bowie saw Vaughan play. Bowie contacted him for a studio gig in December where he played blues guitar on the album Let's Dance (1983). John Hammond heard a demo album that Vaughan and Double Trouble had recorded and interested major label Epic Records in signing them to a record deal in March 1983. Within months, they achieved mainstream success for the critically acclaimed debut album Texas Flood. With a series of successful network television appearances and extensive concert tours, Vaughan became the leading figure in the blues revival of the 1980s.