The document discusses the history of communication and information sharing from pre-printing era to modern digital era. It covers early communication methods like palimpsests and manuscripts that relied on visuals. It then moves to the era of movable type and mass literacy enabled by Johannes Gutenberg's printing press. Finally, it discusses the digital era where information has become primary and people exist as information that can be endlessly copied on networks, creating paradoxes for innovation. The document is divided into three chapters covering these major transitions in how humans communicate and share information.