Entropia e informazione nell’opera di Léon Brillouin

After the second world war, the birth of cybernetics and information theory gave rise to new conceptual tools for exploring the meaning of entropy and understanding its relation with information. The key scientist who exploited in a systematic way the relation between entropy and information was Léon Brillouin. The paper attempts a reconstruction of the history of his “Negentropy Principle” and discusses its epistemological implications.