A rock opera is a collection of rock music songs with lyrics that relate to a common story. Rock operas are typically released as concept albums and are not scripted for acting, which distinguishes them from operas, although several have been adapted as rock musicals. The use of various character roles within the song lyrics is a common storytelling device. The success of the rock opera genre has inspired similar works in other musical styles, such as rap opera.

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. They are 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 synthesisers, 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. The Who were inducted into the Rock and Roll Hall of Fame in 1990.