Golden age hip hop (the mid-1980s to early ’90s)[53] was the time period where hip-hop lyricism went through its most drastic transformation – writer William Jelani Cobb says “in these golden years, a critical mass of mic prodigies were literally creating themselves and their art form at the same time”[54] and Allmusic writes, “rhymers like PE‘s Chuck D, Big Daddy Kane, KRS-One, and Rakim basically invented the complex wordplay and lyrical kung-fu of later hip-hop”.[55] The golden age is considered to have ended around 1993–94, marking the end of rap lyricism’s most innovative period.[53][55]