Two wiki projects of collaborative fiction: one that fails and another that is developed with success, function like pretext in this article to deploy a reflection on the new thought ways and on the new social nexus favored today for the new technologies of the information and the communication: the project of the collective intelligence. Four authors ground this reflection: Pierre Lévy, Derrick of Kerckhove, Howard Rheingold and David Casacuberta. After showing the possibilities of the collective intelligence exercises, the article concludes affirming that the space of the knowledge is constituted, irreversibly, in a new anthropological space: the one of the collective intelligence, to which we all are called to build.