The document discusses Marshall McLuhan's views on electronic media like the telegraph. It provides context on the telegraph's development and impact. According to McLuhan, the telegraph had several key effects: it allowed for instant transmission of information over long distances, it weakened traditional power structures by enabling direct communication across hierarchies, and it fostered interdependence among social institutions. The document examines other media like the telephone and their unintended consequences, noting that new technologies often improve old media before their true effects emerge.