Book excerpt: In this work, Igwebuike is employed as a unifying concept of African thought, especially, that aspect concerning the human person’s conception of the spiritual and material universe in which he or she lives. It is an explanatory theory or principle that interprets the puzzle of our complex relationship with the non-corporal world and human social life, that is, major social institutions that ensure social continuity and group identity, and further, underpins the epistemological manifestations of the human person’s universe.