Blues rock in the context of "Led Zeppelin"

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.