This extraordinary saga in the three main centers of civilization (West, East and Arab-Muslim world) takes us on a formidable journey through time and the world to understand the way in which writing has shaped human societies over the millennia. . We discover the fascinating history of its origins, with new revelations from archaeologists and philologists, but also the manufacturing secrets of the supports and writing materials of the past. Rich in archival images illustrating the major reforms of the last century, supported by testimonies from neuroscientists, artists and specialists, the latest episode of this fascinating documentary series also questions our contemporary uses in the digital age.