If melancholy remains at the heart of the problems facing humanity today, it is because the world it has to face up to is an unavoidable source of concern, particularly in view of the current humanitarian challenges and the irreversible change in our climate regime. The «known» world will never be the same again and now seems like a lost paradise. The digital revolution of the 2000s ushered in a form of dehumanization of human relations, questioning the extent to which the individual remains a unique and irreplaceable being.