This book is a translation of Zubiri's lectures, published posthumously and partially edited by Zubiri for publication. This translation was made possible by a grant from the Spanish Ministry of Culture and is the product of three experts in the thought of Zubiri.

This book introduces profound reflections of Xavier Zubiri on the history of philosophy to English-speaking audiences. The book discusses the transcendental in Western philosophy and how a firm grasp of it reveals underlying unity, but also fundamental problems that Zubiri believed require a complete rethinking of certain theories.