The virtues of the blue eagle is a revealing tool of the Lega ancestral leadership choices in which, generosity is at the center of its culture and its alienation is at the base of its social, political and economic paralysis. The biography of Dr. Eustace Kakisingi Tanganika unveils the mystery of the choice of notability among the Lega people and informs the balance of adaptation of the ancestral culture to that of the contemporaries. This book is a valid response to the concern for in-depth knowledge of the cultural life of the Lega people, whose social ethics are the foundation of their psychology. A people recognized in the world through its works of art that are not linked to ancestor worship, magical practices or fertility rites. But rather, a secular art integrated only to initiatory ceremonies.From the origins of the Lega People, its culture and its different social phenomena, it is known as a Black African Jew living in the East of the DR Congo.