Abstract
Many commentators have analyzed the Papal Encyclical on the care of the environment entitled “Laudato Si’” from various angles but relatively few have written on the philosophical presuppositions that inform the overall stance of the encyclical. It is becoming increasingly evident that, to appreciate the full impact of this work, we need to uncover its ontological and epistemological commitments. This paper makes a contribution in this neglected area by focusing on the nature of life. Two main points are explored: the way all lifeforms depend on other lifeforms, implying that the biosphere often functions like one single unit of life, and the issue of the intrinsic value of each living thing. By situating the encyclical’s arguments within the history of ideas on the nature of life, the environment, and ecology, this research helps to better appreciate the originality of this document.