Yup, in point of fact, pretty much the entire "western" moral matrix was constructed by an African as was a huge percentage of common Christian theology. It was some guy who lived in the north of Africa...
Augustine of Hippo. In fact, I'd argue that Augustine is actually more important to modern western culture than Plato is...
But you probably meant sub-Saharan Africa, given that north Africa historically was heavily integrated into what we consider "western civilization". That said, you really should be more precise, because it leaves you open to EXACTLY this kind of critique.
As a point of fact, I do kinda feel that all y'all are being a bit, well, Eurocentric in your understanding of this matter. Yes, there are parts of the world that have not generated great works of literature and philosophy. These areas of the world also happen to align with the parts of the world that lagged behind in having settled civilizations. India, China, Korea, Japan, and South east Asia in general all generated many great works of philosophy and literature that are completely unrelated to the western canon. In point of fact, the first novel was not even
written in the west, rather, the first novel is generally regarded to be
Japanese via the
Tale of Genji.
But just because societies didn't value the written word as highly as the far east, near east, and Mediterranean civilizations did, doesn't mean they should be disregarded and mocked.
All that said, ejecting the canon of western literature and philosophy is just plain foolish in and of itself. History and where a people come from is valuable to study and understand, and refusing to study such just makes unanchored individuals. Of course, that is in reality the point of this, they do not want students to have an understanding of their own civilization so that instead they can be indoctrinated into being members of a new civilization that these elites seek to create, one founded not on western civilization, but rather on their own ideals.