Why did Chicago become a major center of jazz after World War I?

Chicago emerged as a major center of jazz following World War I primarily due to the Great Migration, which brought large numbers of Black Southerners to Northern urban centers in search of better economic opportunities and an escape from racial violence.1

This demographic shift was a catalyst for the city's musical development. Additionally, the 1917 closing of Storyville in New Orleans displaced many musicians, prompting them to head north to Chicago, which rapidly established itself as a jazz capital. Notable figures such as King Oliver migrated to the city in 1918, later joined by his protégé Louis Armstrong, whose work in Chicago helped define the era's sound.2

The city's vibrant scene was further supported by a substantial market for music, and by the 1920s, it fostered the development of the "Chicago style" of jazz, characterized by its emphasis on individual solos and the influence of both Black and white musicians who had converged in the city.34