sentences:  The "Discourse", although created by d'Alembert, was actually a result of collaboration with other "men of letters" aiming towards the same progressive goals of the Enlightenment.Three of these major contemporary "philosophes" that undoubtedly contributed to the guiding philosophies and beliefs of the "Discourse" include Denis Diderot, Jean-Jacques Rousseau, and Étienne Bonnot de Condillac, with whom d'Alembert was known to have been in contact.These men shared a passion for the dissemination of scientific knowledge.