The blues did not begin in a recording studio. It began in the fields, prisons, and back roads of the American South after the Civil War, growing from the field hollers, work songs, and spirituals that enslaved people had used for more than a century to endure, communicate, and maintain humanity under conditions designed to strip all three away. After emancipation, freed Black people who had no property, limited mobility, and near-total economic dependence on the same white landowners who had enslaved them developed the blues as a musical form that could hold all of it: grief, joy, desire, humor, rage, and longing. It was secular music, which made it suspicious to churches. It was Black music, which made it invisible to mainstream publishers and radio stations. For its first several decades, it traveled by word of mouth.

The Delta blues crystallized around the plantation communities of the Mississippi Delta in the early 1900s, particularly around Dockery Farms — a massive cotton plantation where musicians including Charley Patton, Son House, Robert Johnson, and Howlin' Wolf all spent time. Patton, considered the father of Delta blues, was a flamboyant performer who played guitar behind his head and with his teeth, drawing crowds on Saturday afternoons outside the commissary. He mentored younger musicians who would go on to define the form. Robert Johnson, perhaps the most mythologized figure in blues history, recorded only 29 songs before his death at 27 — but those songs influenced Eric Clapton, Led Zeppelin, and the Rolling Stones decades later.

The blues entered the recording industry almost by accident. In 1920, a Black composer named Perry Bradford convinced Okeh Records to record Mamie Smith, a Black blues singer, on what was marketed as a 'foreign language' record for an ethnic community. When Black audiences discovered they could buy a record of a Black artist singing Black music, they bought it in numbers that shocked the industry: 75,000 copies of the first release, then 100,000 copies of the follow-up, 'Crazy Blues.' Other record labels rushed in. The era of 'race records' — music marketed to and by Black audiences — had begun, and it documented some of the most important music of the 20th century. It also mostly denied the artists any meaningful royalties.

The Great Migration — the movement of millions of Black Americans from the South to Northern cities beginning around 1916 — carried the blues with it. In Chicago, the form electrified. Muddy Waters, Howlin' Wolf, Little Walter, and Buddy Guy developed the Chicago blues sound: amplified, aggressive, ensemble-based, built for dance halls. In the 1950s, this electrified blues became the foundation for rock and roll. Elvis Presley's 'Hound Dog' was first recorded by Willie Mae 'Big Mama' Thornton. The Rolling Stones took their name from a Muddy Waters song. Led Zeppelin's 'Whole Lotta Love' borrows directly from Muddy Waters' 'You Need Love.' Chuck Berry, Little Richard, and Bo Diddley built rock and roll from blues. They were largely shut out of rock radio as their music was covered by white artists for white audiences.

The blues has never stopped evolving. From B.B. King's fluid single-note style to the soul-blues of Bobby 'Blue' Bland, from the Texas tradition of Stevie Ray Vaughan's mentors to the modern blues of Gary Clark Jr. — the form keeps absorbing and generating. But its core condition has not changed since the Delta: it is music that takes the weight of Black American life and makes it bearable to carry. The Smithsonian's National Museum of African American Music, which opened in Nashville in 2021 after two decades of planning, frames its entire exhibition structure around the blues as the trunk from which all other American music grows — jazz, gospel, R&B, country, hip-hop, rock. The roots are Black. The trunk is Black. The branches have a complicated relationship with the people who planted the tree.