The Encyclopédistes (French: [ɑ̃siklɔpedist]) (also known in British English as Encyclopaedists, or in U.S. English as Encyclopedists) were members of the Société des gens de lettres, a French writers' society, who contributed to the development of the Encyclopédie from June 1751 to December 1765 under the editors Denis Diderot and Jean le Rond d'Alembert, and only Diderot from 1765 to 1772. Source: Wikipedia (en)