If this is for an academic paper, I would suggest you start by reviewing the general literature critiqueing these kind of essentialist arguments (arguments that suggest categories of people - usually based on 'race' - share commonly inherited attributes which, in turn, give rise to particular cultural practices).
Personally I would recommend you look at the work of Paul Gilroy, specifically his 1993 book The Black Atlantic, or,for a more accessible account of his work specifically applied to 'black music', see Keith Negus's 1997 book Popular Music in Theory: An Introdution - the chapter on indentities.

I hope this is of some use.

Brian