But when we go back to the original cultural appropriation of Rock and Roll, we often see that's the same thing that happened there. Regional, cultural proximity. Here's the wiki article quote on the orgins of rock and roll. The migration of many former slaves and their descendants to major urban centers such as St. Louis, Memphis, New York City, Detroit, Chicago, Cleveland, and Buffalo (See: Second Great Migration (African American)) meant that black and white residents were living in close proximity in larger numbers than ever before, and as a result heard each other's music and even began to emulate each other's fashions.[21][22] Radio stations that made white and black forms of music available to both groups, the development and spread of the gramophone record, and African American musical styles such as jazz and swing which were taken up by white musicians, aided this process of "cultural collision".