On the Sufficiency of Natural Religion

In the bustling intellectual climate of mid-18th century France, Denis Diderot, a luminary of the Enlightenment, penned "De la suffisance de la religion naturelle" in 1746. This incisive treatise, composed in the fervor of youthful inquiry, remained unpublished until 1770, when it appeared in the "Recueil philosophique," a compilation curated by Jacques-André Naigeon. Interestingly, the work was initially misattributed to the Marquis de Vauvenargues. This is one of his earliest works, displaying his engagement with theological and philosophical questions during the Enlightenment. In this text, Diderot explores the idea that natural religion—rooted in reason and observation of the natural world—might be sufficient for moral and spiritual guidance, without the need for organized religion or divine revelation. He critiques the dogmas and rituals of institutionalized faith, advocating instead for a more rational and empirical approach to understanding the divine. This work marks Diderot's initial foray into questioning traditional religious structures, a theme that would recur throughout his career. While not as widely studied as his later works, it provides important insight into the development of his philosophical thought and his growing skepticism toward established religious authority. Already, Diderot was in open conflict with his overly religious brother, whom he openly hated, driving his philosophy towards an unanchored Materialism. Structured as a series of 27 contemplative reflections, Diderot's work delves into the essence and adequacy of natural religion—that is, a belief system grounded in human reason and the observable world, independent of supernatural revelation. The text serves as a bridge in Diderot's philosophical evolution, linking his earlier theological musings to his later materialist convictions. Notably, the ninth reflection echoes sentiments from his "Pensées philosophiques," underscoring a continuity in his critique of religious orthodoxy and an advocacy for a morality derived from nature itself. This edition contains a new Afterword by the translator, a short biography, a glossary of Philosophical Terms used by Diderot, a chronology of his core life and works, and a summary index of all of Diderot's works. With a clean, modern translation of Diderot's Enlightenment-era French, this edition brings Diderot's thoughts directly into the modern intellectual sphere, tracing the intellectual forces which swept along Diderot and impacted today's secular sphere.