Jesse T. answered 21d
US History Expert
This is a fantastic question.
Let's unpack The Great Migration which began at around 1910 and ended in 1970. This was the single largest migration of black Americans from the Southern US, across the Northern and Midwestern US. It totaled at around 6 million people moved from the South.
The Harlem Renaissance was a cultural awakening in Harlem during the 1920s to the 1930s.
Putting the pieces together, the Harlem Renaissance and the Great Migration are intrinsically linked. As black migrants moved to Harlem, the cultural diffusion was allowed to happen. Jazz music came from the musical traditions of the blues, which had its roots in African traditions, and throughout the Renaissance, this new style of music emerged. Louis Armstrong was among one of the greats in jazz music.
There was also literature from the likes of Langston Hughes, and Claude McKay. The visual arts also flourished during this time with Aaron Douglas.
Though here's a very tough question:
Why Harlem?
And the answer is complicated. There was an area in the US like Harlem by the 1920s, and that was Tulsa OK, the Greenwood District. It was dubbed "Black Wall Street" and it was effectively erased in 1921 during the Tulsa Race Massacre.
Other areas were trickier. In the Midwest, Indiana was hostile. It was a KKK stronghold, and cities like Chicago and Detroit red lined black residents fiercely.
The Great Migration led to the Harlem Renaissance because it was allowed to thrive beyond the 1920s.