For the 31st issue of Questions de communication, Nathalie Heinich (EHESS, CNRS) extracted 10 proposals from her book published early in 2017, Des Valeurs. Une approche sociologique (Values: A sociological approach). By characterising the diversity of attributions given to values in situations, she exposes the outlines for a scientific project which various researchers discuss in this special issue: Laurence Kaufmann and Philippe Gonzalez (University of Lausanne), Louis Quéré (EHESS, CNRS) and Danilo Martuccelli (Millennium Nucleus Centre Authority and Power Asymmetries - Université de Paris - Universidad Diego Portales, Chile). Although all of them consider Nathalie Heinich’s project to be heuristic, they suggest that some aspects require further nuance, and they develop complementary analyses that will be of interest for all the humanities and social sciences.