Supplément au voyage de Bougainville, ou dialogue entre A et B sur l'inconvénient d'attacher des idées morales à certaines actions physiques qui n'en comportent pas. ("Addendum to the Journey of Bougainville, or dialogue between A and B on the drawback to binding moral ideas to certain physical actions which bear none") is a set of philosophical dialogues written by Denis Diderot, inspired by Louis Antoine de Bougainville's Voyage autour du monde. It was written in 1772 for the journal Correspondance littéraire, which commissioned him to review Bougainville's account of his travels, but not published until 1796. Background Bougainville, a contemporary of Diderot, was a French explorer whose 1771 book Voyage autour du monde (A Voyage Around the World) provided an account of an expedition that took him to Argentina, Patagonia, Indonesia, and Tahiti. It was the utopian descriptions of the latter that inspired Diderot to write his review in the form of a fictional Supplement. Structure The Supplement spans either four or five chapters, depending on the edition. Each takes the form of a dialogue between two people, but the characters and setting varies. Chapter two features a Tahitian Elder addressing a hypothetical Bougainville; chapters three and four are between a villager named Orou and his European almoner guest; in chapters one and five, speakers known only as "A" and "B" speak in a literary space apart from Tahiti, commenting on and drawing lessons from the noted differences between Tahitian and European culture. In each of the dialogues, Diderot aligns one character with European culture and the other with Tahitian culture for the purpose of contrasting the two. This kind of nature–culture divide was a common strategy to critique aspects of European culture during the Enlightenment. Theme of Sexuality in Supplément au Voyage de Bougainville Origins Because of his study of nature and the advancements in life sciences, Denis Diderot came to the conclusion that universal progress depends largely on Eros. For Diderot, Eros is "a priori existence of sexual energy that fuels the universe." This concept greatly influenced Diderot's views on human sexuality. His involvement in Enlightenment movements such as sensualism, vitalism and materialism also helped him to develop his ideas about human sexuality. He believed that nature had a moral end and encourages humans to have children. Since nature favors procreation, laws and rules should not restrain the sexuality of men and women. Since 18th century French society