 "They were replaced by a bunch of toughs coming in from outlying suburbs who were only beginning to discover punk's speed, power and aggression";"dispensing with all pretension, these kids boiled the music down to its essence, then revved up the tempos...and called the result "hardcore", creating a music that was "younger, faster and angrier, [and] full of...pent-up rage..." Hardcore historian Steven Blush states that for West coasters, the first hardcore record was "Out of Vogue" by the Santa Ana band Middle Class.The band pioneered a shouted, fast version of punk rock which would shape the hardcore sound that would soon emerge.In terms of impact upon the hardcore scene, Black Flag has been deemed the most influential group.