How many times had Paladin looked into this human face, its features animated by neurological impulse alone? He did not know. Even if he were to sort through his video memories and count them up one by one, he still didn't think he would have the right answer. But after today's mission, human faces would always look different to him. They would remind him of what it felt like to suffer, and to be relieved of suffering.

It is the thesis of this book that society can only be understood through a study of the messages and the communication facilities which belong to it; and that in the future development of these messages and communication facilities, messages between man and machines, between machines and man, and between machine and machine, are destined to play an ever-increasing part.