International audienceFrom the point of view of the geomorphologist, human activities show that societies act like “kleptocracies” withregard to the environment. To possess a deep knowledge of nature, it is essential to “enter into a contract” with it. Hence, thenatural environment may be considered as a permanent school of life, such as are the symbolic works of thinkers and artists.In his role as a citizen, the geographer is well prepared to allow a better ownership of the physical world on which we depend.Pour le géomorphologue, les activités humaines montrent que les sociétés fonctionnent comme des « kleptocraties» vis-à-vis de l’environnement. « Passer un contrat » avec la nature s’impose pour bien la connaître. On peut donc voir le mi...