afrikan thought starts BEFORE the introduction of these alien ideologies... one would have to go THERE to even begin. After that a steady chronological progression through time will 1)point to the specific instances of these foreign influences and 2) how they changed what existed BEFORE.
simply put, after the influx of these systems there is no longer a "pure" afrikan way of thought, but something more "synthesized" of the two. one which in all reality is the "actualization" of afrikan thought. (synthesis over division)
It's sorta like how one would start with a base color for painting and coming up with something different with every addition of other colors. the base and foundation is present, one has to just compare and contrast that (what is remembered and retained) with what exists presently.
There ARE people (afrikans) who hold onto the traditions in their pure form and can simultaneously interact with the changing face of their systems as well. These are the people who i'd ask of afrikan theory before the people whose origins in afrikan cultures lie in that "mixed" place.