What makes Empire by Queensrÿche notable?

'Empire' debuted at No. 7 on the Billboard 200 chart and is notable for its hit single 'Silent Lucidity,' which earned the band a Grammy nomination. The album's exploration of political themes resonated with listeners during a time of social change, influencing the progressive metal genre. Released in 1990, 'Empire' marked a significant point in Queensrÿche's career as their fourth studio album, following the critically acclaimed 'Operation: Mindcrime.' The band was experiencing commercial success, solidifying their place in heavy metal while transitioning toward more mainstream appeal.