“…Attracting and sustaining collaborations has been at the heart of the open calls of HBP (Lorents et al, 2023). Despite these efforts, monitored by ethnographic studies in social sciences (Mahfoud, 2018(Mahfoud, , 2021Aicardi and Mahfoud, 2022;Rüland, 2023), it remains unclear at the end of the project what type of community has emerged or been consolidated. To my knowledge, no quantitative independent social network study has been yet made, looking at the full longitudinal history of the HBP flagship, to analyze (1) the evolution of collaborative networks (to illustrate for instance a possible revitalization by open calls) and (2) the interpenetration of the different scientific fields.…”