Utopia's value lies not in its relation to present practice but in its relation to a possible future. Its "practical" use is to overstep the immediate reality to depict a condition whose clear desirability draws us on, like a magnet.

Utopia confronts reality not with a measured assessment of the possibilities of change but with the demand for change. 'This is the way the world should be.' It refuses to accept current definitions of the possible because it knows these to be part of the reality that it seeks to change... Wilde was right: 'A map of the world that does not include Utopia is not worth even glancing at.

Utopia retains throughout its long history the basic form of the narrative of a journey. The traveler in space or time is an explorer who happens upon utopia. He (or, more recently, she) meets its people, usually at first its ordinary people, observes them at work and play, sees their dwellings and their cities... The traveler is, as are we, the more prepared to accept the validity and desirability of the general principles for having seen with his own eyes its effects in the daily life of its inhabitants.

Utopia retains throughout its long history the basic form of the narrative of a journey... First comes the picture of a happy people in a beautiful and well-ordered setting; then comes the lecture on how it all came about, how it works, and, by implication, how it might be made to work in the traveller's own society.