Iron Maiden helped pioneer the new wave of heavy metal sound that rose to prominence in the mid to late 1970s. The group is a classic metal act with galloping power chords, harrowing vocals, chugging rhythms and a theatrical live show. Though the English act has been pegged as satanic by many conservative Christian groups, this backlash only seems to heighten the appeal of Iron Maiden and add to the reputation of the band as one of the more nefarious acts of its day.