The document discusses Marshall McLuhan's theory that "the medium is the message" and how new technologies introduce changes to human affairs and society in terms of scale, pace, and pattern. It provides examples of how print culture and electronic media affected fragmentation, centralization, and perceptions of time and space. McLuhan believed new technologies have "unanticipated consequences" and change social and cultural forms in non-obvious ways that people often fail to recognize. The document also examines McLuhan's views on the differences between oral, literate, and electronic eras and cultures.