Van Sertima does devote a considerable portion of the book to interaction of cultures within Africa as well, with Chapter 7 and 8, titled “Black Africa and Egypt” and “The Black Kings of the 25th Dynasty” in which he explores the West and Southern African man’s influence on the ancient Egyptian civilization. He devotes Chapter 8 to discussing the beneficial innovations and flourishing of culture under Nubian rulers in Egypt. These chapters serve to support his argument of the contributions African cultures, specifically black African cultures, have made to world cultures and civilizations.