Jazz: How a New Orleans Sound Became America's Defining Art Form

Jazz is widely traced to New Orleans at the end of the 19th century, according to the U.S. National Park Service, which manages the New Orleans Jazz National Historical Park. The city's distinctive mix of French, Spanish, African, Caribbean and Anglo-American populations created conditions that the agency describes as ideal for musical innovation.

Birth in New Orleans

The National Park Service notes that enslaved West Africans made up about 30% of New Orleans' population as early as 1721 and grew to more than half by the end of that century. Congo Square in the city preserved African dance and drumming traditions, while Mardi Gras Indian processions carried call-and-response chanting patterns rooted in West African music. Brass bands became widely popular in the 1880s and 1890s, and syncopated ragtime piano gained national popularity by the 1890s, the agency says.

According to the Park Service, mutual aid societies and social clubs sponsored parades with brass bands, giving rise to the community-participation tradition known as the "second line." By the 1890s, musicians who could not read music began weaving improvised blues phrasing into familiar dance tunes. Uptown cornet player Charles "Buddy" Bolden is described by the Park Service as the musician many early jazzmen credited as the first to develop a distinctive new style. Segregation laws of the era pushed Black and Creole musicians together, and the Park Service says the resulting blend of uptown improvisation and formally trained Creole musicianship produced jazz's characteristic polyphonic sound, with cornet, clarinet and trombone improvising simultaneously. Early figures cited include Jelly Roll Morton, King Oliver, Sidney Bechet and Louis Armstrong. The music spread north after 1907 and had become a national phenomenon by 1917, per the agency.

Swing Takes the Nation

The swing era is generally dated from the early 1930s to 1947, according to a Wikipedia summary of the period drawn from standard jazz histories. A widely cited turning point came on August 21, 1935, when Benny Goodman's band drew an unexpectedly large, enthusiastic crowd at the Palomar Ballroom in Los Angeles, a moment credited with bringing big-band swing to national audiences. Bandleaders who defined the era included Duke Ellington, Count Basie, Fletcher Henderson, Cab Calloway, Jimmie Lunceford, Benny Goodman, Glenn Miller, Tommy Dorsey and Artie Shaw.

Swing reorganized jazz around larger ensembles of roughly 12 to 16 players reading written arrangements rather than improvising collectively. The rhythm section shifted to piano, guitar, bass and drums, replacing the tuba with string bass and the banjo with guitar, and the music moved from a two-beat to a four-beat feel. Fletcher Henderson's arranging style, built on repeated riffs played in call-and-response between sections, became the genre's standard approach. The era's dominance ended amid a 1942–1944 musicians' recording strike, wartime travel restrictions, radio bans and growing interest in bebop and vocal-centered pop music.

Bebop: Jazz Turns Inward

Bebop developed during the 1940s as a reaction against the restrictions of big-band swing, according to a history published by Carnegie Hall. As ballroom dancing declined after World War II and related venues closed, swing musicians increasingly formed smaller combos that allowed greater improvisational freedom. The style is attributed primarily to trumpeter Dizzy Gillespie, alto saxophonist Charlie Parker, and pianists Thelonious Monk and Earl "Bud" Powell, with drummers Kenny Clarke and Max Roach shaping its rhythmic foundation.

These musicians organized late-night jam sessions at Minton's Playhouse in Harlem, where, Carnegie Hall notes, they experimented with unconventional chromaticism and dissonant sounds, sometimes playing at extremely fast tempos with unusual chords specifically to discourage less-skilled players from joining in. Unlike swing's emphasis on melody and regular phrasing, bebop built improvisation around harmonic structure, using irregular phrase lengths and abrupt stops. The shift was musical and cultural: bebop became associated with its own style of dress and speech alongside its sound.

Jazz as Cold War Diplomacy

Jazz's international role deepened during the Cold War. According to a Time magazine account of the period, the idea of sending jazz musicians abroad as cultural ambassadors originated in 1955 with a suggestion from Congressman Adam Clayton Powell Jr., and the State Department's first official tour, led by Dizzy Gillespie, took place in 1956. Dave Brubeck's quartet performed twelve concerts in Poland in 1958, among the first American jazz performances held behind the Iron Curtain. Louis Armstrong toured parts of Africa in 1961 after initially declining to take part in a planned 1957 tour of the Soviet Union.

The State Department's strategy, as described by Time, framed jazz's improvisation within set musical structures as a reflection of American democratic values, and officials deliberately sent racially integrated bands to project an image of racial harmony abroad even as segregation continued at home.

Armstrong had earlier refused to take part in the planned Soviet tour, citing the 1957 school desegregation crisis in Little Rock, Arkansas. He and Brubeck later created a stage work, "The Real Ambassadors," which, according to Time, Dave Brubeck's son Darius Brubeck said was meant to question how the United States could promote democracy abroad while the American South remained segregated. Time reports the broader cultural exchange program is nonetheless credited with contributing to Cold War détente, including later nuclear-disarmament discussions in the 1980s.

Lasting Legacy

Within the United States, jazz has been formally recognized through the National Endowment for the Arts' Jazz Masters fellowship, which the agency's website describes as the highest honor the nation bestows on jazz artists. Established in 1982, the fellowship honors living musicians, composers and educators for significant contributions to the art form; the NEA's 2026 class of fellows includes Rhonda Hamilton, Carmen Lundy, Airto Moreira and Patrice Rushen, recognized at an annual tribute concert.