In order to explore a diversity points of view on the commons, we conducted a series of interviews with people who work on the commons and are part of government agencies for development, research organisations, and, NGOs. We conducted a qualitative analysis of the transcript of the interviews. We will present the lessons drawn from this analysis. We highlight some of them here: For most of the surveyed people, the domain of the commons was introduced by an experience or a meeting that changed their outlook on their own actions. The commons translate a vision of society: supporting or promoting them contributes to a project of society. Most of the authors deplore the domination of the State and the market, but they indicate the commons should be articulated with these dominant forces The multiplicity of perceptions on the commons challenge the ‘interest of a typology. However there is a need to name them to recognize them, and the debate is then on how it should be recognized. On this subject, many contributions relate to laws, but this is not the unique channel to formalize.