The System of Nature, or, the Laws of the Moral and Physical World. Volume 1 — Edition Insights

The Poet as Original Legislator

Holbach offers a striking account of the origin of religion. He claims that early human societies were led by “wise, strong, and for the most part benign” individuals who spoke to their followers through poetry. These leaders used “images, fictions, numbers, rhyme, harmony” to personify nature and create allegories. The purpose was political: the first “institutors of nations” reserved the right to explain these fables, thereby controlling the people. Holbach treats mythology with a degree of tolerance, seeing it as a representation of nature itself. The trouble began, he argues, when “natural philosophers and poets were transformed by leisure into metaphysicians and theologians.” At that point, a fatal distinction was introduced between nature and something beyond it. This genealogy of belief is central to his critique: religion is not a divine revelation but a human invention that became corrupted.

The Denial of Free Agency

In Chapter XI, Holbach directly attacks the concept of free will. He argues that those who separate soul from body have “enfranchised it from those physical laws” that govern all known beings. For Holbach, the soul is “nothing more than the body, considered relatively to some of its functions.” All intellectual and moral faculties are explained “in a manner purely physical.” He concludes that man is “a being purely physical” whose life is “a line that Nature commands him to describe upon the surface of the earth: without his ever being able to swerve from it even for an instant.” This deterministic stance is the logical outcome of his materialist premises. The excerpts show him marshaling a chain of reasoning: if the soul is modified by the body, and the body is subject to physical causes, then human actions are as necessary as the motion of a stone. Holbach does not soften this conclusion; he presents it as a truth that “will be again proved.”

The Rhetoric of Return

Throughout the excerpts, Holbach employs a distinctive rhetorical pattern: he contrasts false systems with the simple truth of nature. He urges his reader to “fall back on his experience,” “return to Nature,” “occupy himself with reason,” and “consult those objects that are real.” These imperatives create a sense of urgency, as if the reader is being called away from a delusion. The target is clear: “the fictitious bonds that enchain him to the most baneful prejudices.” Holbach’s prose is often dense and abstract, but in these passages it becomes direct and hortatory. He even allows a note of tolerance: if the reader “must always feed itself with illusions,” then at least let others “ramble in their own manner.” This concession is brief, however, and the overall thrust is uncompromising. The structure of the argument—first demolishing the supernatural, then denying free will, then urging a return to nature—is designed to leave no room for compromise.

Readers approaching The System of Nature should be prepared for a work that is both systematic and combative. Holbach writes as if he is dismantling an entire worldview, piece by piece. The excerpts give a clear sense of his method: he states a first principle, derives consequences, and then attacks opposing views with relentless logic. The book rewards careful attention to its chains of reasoning, but also to its moments of rhetorical force. Those interested in Enlightenment materialism, the history of atheism, or the philosophical roots of determinism will find here a foundational text.

Reading Holbach’s unyielding certainty about matter and motion, I found myself missing the quieter, more hesitant tone of another book I once lingered over. His laws feel so absolute, yet that older volume seemed to allow for doubt, for turns rather than systems. It made me think of Some Turns of Thought in Modern Philosophy: Five Essays — Context and Discussion, as if philosophy could also be a gentler wandering.