Rich Harrison grew up in Washington, D.C., which means he grew up with go-go. As the sound of the block, the sound of the weekend, the sound of what percussion does when it refuses to stop moving. He attended Howard University, where he majored in history and hip-hop music, and he carried his classical training as a pianist and trumpet player into a production style that, between 2003 and 2005, quietly repositioned what R&B radio was allowed to sound like. The argument his beats kept making was simple and physical: the drums are enough. Let them breathe. Let the vocalist answer them.

Before either of his two landmark records landed, Harrison had already been laying groundwork. He produced Kelly Rowland's "Can't Nobody," building the track on a sample from Trouble Funk's "Let's Get Small" (1982), a D.C. go-go institution. The song appeared on Rowland's debut solo album Simply Deep and was released as a single in early 2003, peaking at number 97 on the Billboard Hot 100. What it did was establish Harrison's method: reach into the percussion-first tradition of Black American regional music, lift something with a pulse, and let that pulse do the structural work that most producers were assigning to synth layers and programmed strings. The mainstream wasn't ready for it yet. It would be, soon.

By late 2002 and into early 2003, Beyoncé was deep into recording what would become Dangerously in Love, and she called Harrison in. He had the beat already, had been sitting on it, reluctant to shop it widely. When he first shared it with people, their lukewarm response convinced him it was distinctive enough to hold. The beat was built around a sample of the Chi-Lites' 1970 recording "Are You My Woman (Tell Me So)," written by Eugene Record. Harrison pulled the instrumental hook and let it announce the song before a single lyric arrived. "Crazy in Love" was recorded at The Hit Factory and Sony Studios in New York City, co-produced by Harrison and Beyoncé, and released on May 18, 2003, as the lead single from Dangerously in Love. Jay-Z came to the studio around 3 a.m. and improvised his verse in roughly ten minutes, and his presence on the record gave it a second center of gravity. The song spent eight weeks at number one on the Billboard Hot 100 and earned Harrison a Grammy Award in 2004. The brass-and-percussion opening became one of the most recognizable sounds of the decade, and it worked because it was structurally unusual: a sample doing the job of an overture, giving the vocalist a runway instead of a bed.

The deeper story, though, is what Harrison did next. In early 2004, he began working with Amerie on her second album, Touch. He had already produced and co-written her debut, All I Have (2002), so the creative trust was established. In May 2004, Harrison heard the Meters' 1970 recording of "Oh, Calcutta!" for the first time and locked in on a ten-second breakdown between Meters drummer Ziggy Modeliste and guitarist Leo Nocentelli. He built the entire beat around that exchange, adding a bongo drum and cowbell to the sample to push the go-go feeling further into the groove. Amerie and Harrison worked through a long studio session to finish "1 Thing," recorded at Sony Music Studios in New York City and Night Flight in Fort Washington, Maryland. The production was skeletal by the standards of the moment: no synth swells, no orchestral polish, no layered vocal production underneath the lead. Just percussion, horns, and Amerie finding the rhythm of the drums and matching it with her phrasing.

Columbia and Sony Urban Music heard it and hesitated. Label executives told Harrison and Amerie the song sounded unfinished, that the percussion-focused beat needed more music added to it. In Amerie's words, "People just weren't getting it." One description that came back from the label was that the song was "so linear." Behind the scenes, Columbia was reportedly considering moving the song to Jennifer Lopez. Harrison and Amerie refused to add elements, believing more production would overwhelm the track. After several rounds of revision requests with no specific direction given, they made a decision: in late 2004, six months after recording the song, they leaked "1 Thing" directly to U.S. radio stations. Radio took to it immediately. When Columbia pressured stations to pull it, the stations kept playing it anyway. The label released it officially on January 5, 2005. It peaked at number eight on the Billboard Hot 100. Touch followed on April 26, 2005.

What Harrison was doing, across "Can't Nobody," "Crazy in Love," and "1 Thing," was making a consistent argument about where R&B's rhythmic center of gravity should sit. In an era when the dominant production aesthetic, as heard across the work of Timbaland, the Neptunes, and Darkchild, leaned into digital precision and layered sonic architecture, Harrison kept reaching for something older and more physical. Go-go is a music that never stops. It doesn't resolve to a chorus and breathe out. It builds and compounds, and the drummer is the anchor for everything. Harrison carried that logic into pop radio and disguised it as a sample flip. The label executives who called "1 Thing" unfinished were hearing the absence of what they expected. What they couldn't hear was that the absence was the point. Ziggy Modeliste's hands on a kit in 1970 were still doing the work in 2005, and Amerie's voice was answering them directly, no padding in between. That directness is what the radio couldn't stop playing.