In an excerpt from his new book, The Future, the Nobel Prize winner and former vice president talks global networks, Marshall McLuhan, and how computing is changing what it means to be human.Writers have used the human nervous system to describe electronic communication since the invention of the telegraph. In 1851, only six years after Samuel Morse received the message "What hath God wrought?" Nathaniel Hawthorne wrote: "By means of electricity, the world of matter has become a great nerve vibrating thousands of miles in a breathless point of time. The round globe is a vast brain, instinct with intelligence." Less than a century later, H. G.