[The development of the international network of Pasteur Institutes from 2003 to 2013].

The expansion of the Institut Pasteur international network from 2003 to the present day, has coincided with the strengthening of a common legal framework, associated to a Declaration of shared scientific and ethical values qualified as "Pasteurian". The article explores the originality of the network, emphasises the importance of its reference to a shared history, and hypothesizes the ongoing fabrication of an esprit de corps uniting scientists coming from a variety of communities. The RIIP may thus be the tool of a scientific diplomacy working to lessen the inequalities in the domain of scientific and medical knowledge, in an unstable world.