This book is a reaction against young Levy Bruhl's position that the world's (African) thought is pre- logical. Systematically therefore it exposes first the influence of positivism and two valued Logic on Bruhl which made him to be anti- spiritualism and second interpreted African thought from two- valued logic point of view. This wrong interpretational tool resulted to his ''onslaught on African thought'' which is the subject of the book's reaction. This book 's position is that every interpretation stems from a particular logic and this logic needs to evolve from the same ontological context with the phenomenon that is to be interpreted. The implication of this is that, there is a bio conditional structural relationship between every logic and its cultural ontology.