The Mothers of Invention were an American rock band from California. Formed in 1964, their work is marked by the use of sonic experimentation, innovative album art, and elaborate live shows. Originally an R&B band called the Soul Giants, the band's first lineup comprised Ray Collins, David Coronado, Ray Hunt, Roy Estrada, and Jimmy Carl Black. Frank Zappa was asked to take over as the guitarist when a fight between Collins and Hunt led to the latter's being fired. Zappa insisted they perform his original material - a decision that resulted in Coronado's leaving because he did not agree to the change - and on Mother's Day in 1965 the band changed its name to the Mothers. Record executives demanded the name be changed again, and so, "out of necessity", Zappa later said, "We became the Mothers of Invention", referencing the proverb "Necessity is the mother of invention."
After early struggles, the Mothers enjoyed substantial popular commercial success. The band first became popular playing in California's underground music scene in the late 1960s. With Zappa at the helm, it was signed to jazz label Verve Records as part of the label's diversification plans.