In the introduction to McLuhan's Understanding Media he writes: ‘Today, after more than a century of electric technology, we have extended our central nervous system in a global embrace, abolishing both space and time as far as our planet is concerned’ (1964: p.3). Like much of McLuhan's writing this statement is vast and poetic, with its strength of conviction making it quite persuasive. But if we are to be believers in this rhetoric we must have an understanding of what he means.