Kurtis Blow was born Kurtis Walker in Harlem in 1959. He was in on the earliest stages of hip-hop culture in the '70s -- first as a breakdancer, then as a block-party and club DJ performing under the name Kool DJ Kurt; after enrolling at CCNY in 1976, he also served as program director for the college radio station. He became an MC in his own right around 1977, and changed his name to Kurtis Blow (as in a body blow) at the suggestion of his manager, future Def Jam founder and rap mogul Russell Simmons. Blow performed with legendary DJs like Grandmaster Flash, and for a time his regular DJ was Simmons' teenage brother Joseph -- who, after changing his stage name from "Son of Kurtis Blow," would go on to become the first half of Run-D.M.C. Over 1977-1978, Blow's club gigs around Harlem and the Bronx made him an underground sensation, and Billboard magazine writer Robert Ford approached Simmons about making a record. Blow cut a song co-written by Ford and financier J.B. Moore called "Christmas Rappin'," and it helped him get a deal with Mercury once the Sugarhill Gang's "Rapper's Delight" had climbed into the R&B Top Five.
"If I Ruled the World" proved to be the last gasp of Blow's popularity, as hip-hop's rapid growth made his style seem increasingly outdated. 1985's America was largely ignored, and 1986's Kingdom Blow was afforded an icy reception despite producing a final chart hit, "I'm Chillin'." Critics savaged his final comeback attempt, 1988's Back by Popular Demand, almost invariably pointing out that the title, at that point, was not true. In its wake, Blow gave up the ghost of his recording career, but found other ways to keep the spirit of the old school alive. In the early '90s, he contributed rap material to the TV soap opera One Life to Live, and later spent several years hosting an old-school hip-hop show on Los Angeles radio station Power 106. In 1997, Rhino Records took advantage of his status as a hip-hop elder statesmen by hiring him to produce, compile, and write liner notes for the three-volume series Kurtis Blow Presents the History of Rap. The same year, he was a significant presence in the rap documentary Rhyme and Reason. Blow's music has also been revived by younger artists seeking to pay tribute; Nas covered "If I Rule the World" on 1996's It Was Written, and R&B group Next sampled "Christmas Rappin'" for their 1998 smash "Too Close.
Blow's second single, "The Breaks," was an out-of-the-box smash, following "Rapper's Delight" into the Top Five of the R&B charts in 1980 and eventually going gold; it still ranks as one of old school rap's greatest and most enduring moments. The full-length album Kurtis Blow was also released in 1980, and made the R&B Top Ten in spite of many assumptions that the Sugarhill Gang's success was a one-time fluke. Although the album's attempts at soul crooning and rock covers haven't dated well, the poverty-themed "Hard Times" marked perhaps the first instance of hip-hop's social consciousness, and was later covered by Run-D.M.C. Blow initially found it hard to follow up "The Breaks," despite releasing nearly an album a year for most of the '80s. 1981's Deuce and 1982's Tough weren't huge sellers, and 1983's Party Time EP brought D.C. go-go funksters E.U. on board for a stylistic update. Around this time, Blow was also making his mark as a producer, working with a variety of hip-hop and R&B artists; most notably, he helmed most of the Fat Boys' records after helping them get a record deal. 1984's Ego Trip sold respectably well on the strength of cuts like the DJ tribute "AJ Scratch," the agreeably lightweight "Basketball," and the Run-D.M.C. duet "8 Million Stories." Blow followed it with an appearance in the cult hip-hop film Krush Groove, in which he performed "If I Ruled the World," his biggest hit since "The Breaks."