The book "The System of Nature, or the Laws of the Moral and Physical World. Volume 2", written by Paul-Henri Thiry, Baron d'Holbach, is a fundamental work of the Enlightenment of the 18th century. In this book, the author reveals his views on issues of nature, morality and religion, denying the existence of a higher principle and belief in God. Holbach's encyclopedic view of the world is characterized by great systematicity, logic and strict materialism. The author explains the principles of determinism, rejecting the idea of volitional centralization in managing the world, which was revolutionary for its time. "The System of Nature" is an important work for understanding the history of philosophy and the struggle of ideas during the Enlightenment.