Systeme De La Nature, Part 1: Ou Des Loix Du Monde Physique And Du Monde Moral (1781) is a philosophical book written by Paul Henri Thiry, Baron d'Holbach. The book is divided into two parts, the first part dealing with the laws of the physical world and the second part dealing with the laws of the moral world. In the first part, Holbach argues that everything in the physical world can be explained by the laws of nature and that there is no need to...