The proper functioning of an economy requires five functions: production, consumption, savings, investment and distribution. Sylvestre Ossiala and Angélique Ngoma have uncovered this disturbing truth: African economies have only four functions since the production function is absent. Africa does not produce, it only knows how to consume what is produced by other continents: from cell phones, of which more than 80% of Africans own a prototype, to school pencils, glasses and hardware, all products consumed by Africa are labelled "made in out of Africa". Why does Africa not bother with what bothers all Africans, if not the other way around? By proposing ways out of the atypicality of African economies, through the "development and diversification model" presented here, the authors of this book give Africa the means for its real development and the opportunity to be in tune with other continents and to move together towards true equality of peoples and the balance of humanity.