How does the poem "Heritage" best express racial pride?

In the poem "Heritage," by Countee Cullen, racial pride is characterized as the pride of belonging to the continent of Africa, a concept which unifies black people even when they may not know their specific provenance of origin. Cullen repeats the line "What is Africa to me?" to underscore this point and to lend cohesion to the poem, reminding the reader of the subject of his thoughts.
Africa is deep in the bones of the poet: "when the birds of Eden sang," his roots were there, despite now being "three centuries removed" from the continent. Cullen describes how the "wild barbaric birds," "jungle herds," and "great drums" of Africa seem to reside within his "somber flesh and skin" despite the fact that he personally did not grow up there. As a descendant of Africa, the "jungle" is within him all the same. The phrase "three centuries removed" is repeated in juxtaposition to lengthy and detailed descriptions of Africa's landscape and wildlife, as if to emphasize how deeply Africa is known to and part of the poet, despite his apparent separation from it.