With THE YES ALBUM, Yes began an important new chapter in its career and defined much of what the next decade would bring. They had left behind not only their original guitarist, Peter Banks, but also the covers of 1960s tunes by the likes of the Byrds and the Beatles. The arrival of the more hard-edged Steve Howe signaled the group's ascent into full-blown progressive-rock mode, a style whose parameters Yes helped craft with this recording. Though Rick Wakeman and his classical-influenced arsenal of keyboards had not yet come aboard, Tony Kaye's roiling Hammond organ and Chris Squire's busy bass lines perfectly interacted with Howe's idiosyncratic playing to create a uniquely fugue-like sound, as Bill Bruford's polyrhythms and Jon Anderson's angelic voice simultaneously kept things on a more abstract and ethereal plane than almost anything that had been labeled "rock" up to that point. "Starship Trooper" and "Yours Is No Disgrace" would become hallmarks of prog rock and launch a thousand pale imitations by third-string art-rockers for decades to come.