It's good that he has not declared itself his native Cameroon, which he dedicated to the history of the two-volume "History of Cameroon" (1963, 1985). However, with the transfer of the center of world civilization in Ethiopia was not all agree negro-African historians. So T. Obeng, the author of the book "Africa in Antiquity" (1973, with a foreword by A. S. Diop), a student and opponent Sh A. Diop, Diop went on to defend the theory of Negro origins of Egyptian civilization and the world. Gavristova believes that his interest in the pre-colonial period of African history was connected with the desire to assert themselves, proving negro-African origin of ancient Egyptian civilization. In addition to the arguments Diop, he tried to bring more and linguistic by constructing a "negro-Egyptian language." He argued that this would supposedly once-existing language occurred as the Egyptian and Coptic languages, and all African languages ??contemporary Africa, including common across Africa, the Bantu languages.