In parallel with the empirical work pursued for almost 30 years on the socio-technical networks of science, the author has systematically pursued a philosophical inquiry to compare different ways of producing truth (science and technology being only two ways among several). The principle is to add to the analysis of networks the 'key' in which each type of network is able to spread, this key defining for each type of mediation the felicity and infelicity conditions necessary to grasp it. This project aims at providing a positive philosophical anthropology of the moderns instead of the only negative one offered in 'We Have Never Been Modern'.