Rock opera in the context of "Jesus Christ Superstar"

The Who are an English rock band formed in London in 1964. Their classic lineup (1964–1978) consisted of lead vocalist Roger Daltrey, guitarist Pete Townshend, bassist John Entwistle, and drummer Keith Moon. Considered one of the most influential rock bands of the 20th century, their contributions to rock music include the development of the Marshall stack, large public address systems, the use of synthesizers, Entwistle's and Moon's influential playing styles, Townshend's feedback and power chord guitar technique, and the development of the rock opera. They are cited as an influence by many hard rock, punk, power pop and mod bands. They were inducted into the Rock and Roll Hall of Fame in 1990.

The Who evolved from an earlier group, the Detours, and established themselves as part of the pop art and mod movements, featuring auto-destructive art by destroying guitars and drums on stage. Their first single as The Who, "I Can't Explain" (1965), reached the UK top ten, and was followed by a string of hit singles including "Anyway, Anyhow, Anywhere", "My Generation" (both 1965), "Substitute", "I'm a Boy", "Happy Jack" (all 1966) and "Pictures of Lily" (1967). In 1967, they performed at the Monterey Pop Festival and released "I Can See for Miles", their only US top ten single. The group's 1969 concept album Tommy included the single "Pinball Wizard" and was a critical and commercial success.

A concept album is a musical album whose tracks hold a larger purpose or meaning collectively than they do individually. This is typically achieved through a single central narrative or theme, which can be instrumental, compositional, or lyrical. Alternatively, the term may signify an album that lacks any explicit musical or lyrical motif, but is considered to be of "uniform excellence". Music critics remain divided on the precise definition of a concept album.

The format originates with folk singer Woody Guthrie's Dust Bowl Ballads (1940) and was subsequently popularized by traditional pop singer Frank Sinatra's 1940s–50s string of albums, though the term is most closely associated with rock music. In the 1960s, various rock bands released several well-regarded concept albums, eventually leading to the birth of the rock opera.