Led by Ian Anderson, Jethro Tull was the first group from the progressive era to score resounding chart success. Originally their music was based in rhythm and blues, but punctuated with Anderson's flute playing and larger-than-life stage persona. By Thick As A Brick, the band would provide the ultimate concept album: one song spread over both sides of the album, housed in a newspaper-facsimile record jacket. By the mid-70s, the bands work become more formulaic, but fan favorites were just around the corner, as the folk-roots of Songs For The Wood would attest.
Named after a Swedish stone age chieftain, Kaipa were founded by keyboardist Hans Lundsun and bassit Tomas Eriksson in 1973. Guitarist Roine Stolt, though only a teenager at the time, was an original member.