Created to coordinate public health initiatives at the regional level, the Regional Health Agencies (ARS) have, as a top priority in their roadmap, the goal of reducing social health inequalities. But how can this be achieved, given that these inequalities are driven by socio-environmental conditions (income, employment, housing) that lie outside the realm of health? For Laurent Chambaud, partnership among all stakeholders—from local governments to community organizations—and at the community level is the only realistic strategy to implement. This is the approach adopted by the Île-de-France region.