We are on the verge of a true crisis of civilisation : ecological disruption, chronic insatisfaction of the basic needs of a large part of humanity and degrading physical and mental health in industrialised countries. We must address the crisis's main cause : the pursuit of a development approach focused on economic growth and based on intensive, inefficient use of natural resources. This book is a call for humanity to look itself in the mirror, question its identity as a species and re-examine its place in this world.