The Heritage Association of the Versailles Plain was created in 2004 by a local commitment to protect the territory, the quality of its landscapes, and maintain sustainable agricultural activity. Today, the association aims to support the emergence of sustainable development projects in the still agricultural and natural territory of the Versailles Plain. Sustainable development is considered as meeting the needs of current and future generations. The principle is therefore to enable residents and stakeholders of the territory to express their needs and translate them into demands and then into projects. In this "green" non-urbanized territory, the quality of nature, or of "Life," is considered a common good or shared heritage. This is why the association is called a "heritage association." It brings together all those who are attached to this common good, beyond the competencies and boundaries of local authorities. The association plays a role in connecting stakeholders who are concerned with this shared heritage but are usually compartmentalized: farmers because they manage nature, elected officials through their responsibility for the living environment and climate, residents…