At a time of ecological change, of questioning the ideals of continuous progress and abundance, of mistrust of scientific knowledge, Immanuel Kant's famous tripartite question (What can I know? What must I do? What am I allowed to hope for?) seems to be regaining its dizzying relevance. A question that the philosopher and sociologist of science Bruno Latour - with Nicolas Truong - takes up in a way. Through the examination of his personal and collective work, he reinterprets the place of the human being in the world, the conditions of possibility of its existence and the production of scientific knowledge. These final interviews sound like the philosophical testament of one of the most fertile thinkers of our time. 4 CD audiobook. In French. Christophe LOINTIER & Patrick FRÉMEAUX