Emerson, Lake & Palmer were progressive rock's first supergroup. Greeted by the rock press and the public as something akin to conquering heroes, they succeeded in broadening the audience for progressive rock from hundreds of thousands into tens of millions of listeners, creating a major radio phenomenon as well. Their flamboyance on record and in the studio echoed the best work of the heavy metal bands of the era, proving that classical rockers could compete for that arena-scale audience. Over and above their own commercial success, the trio also paved the way for the success of such bands as Yes, who would become their chief rivals for much of the 1970s.

Keyboardist Keith Emerson planted the seeds of the group in late 1969 when his band the Nice shared a bill at the Fillmore West with King Crimson, and the two first spoke of the possibility of working together. After the Crimson lineup began disintegrating during their first U.S. tour, Lake opted to leave the group. Upon officially teaming in 1970, Emers Далее...