" People who don’t read it, and even some of those who write it, like to assume or pretend that the ideas used in science fiction all rise from intimate familiarity with celestial mechanics and quantum theory, and are comprehensible only to readers who work for NASA and know how to program their VCR. This fantasy, while making the writers feel superior, gives the non-readers an excuse. I just don’t understand it, they whimper, taking refuge in the deep, comfortable, anaerobic caves of technophobia. It is of no use to tell them that very few science fiction writers understand “it” either. We, too, generally find we have twenty minutes of I Love Lucy and half a wrestling match on our videocassettes when we meant to record Masterpiece Theater.
Most of the scientific ideas in science fiction are totally accessible and indeed familiar to anybody who got through sixth grade, and in any case you aren’t going to be tested on them at the end of the book. The stuff isn’t disguised engineering lectures, after all. It isn’t that invention of a mathematical Satan, “story problems.” It’s stories. It’s fiction that plays with certain subjects for their inherent interest, beauty, relevance to the human condition. Even in its ungainly and inaccurate name, the “science” modifies, is in the service of, the “fiction.”
For example, the main “idea” in my book The Left Hand of Darkness isn’t scientific and has nothing to do with technology. It’s a bit of physiological imagination—a body change. For the people of the invented world Gethen, individual gender doesn’t exist. They’re sexually neuter most of the time, coming into heat once a month, sometimes as a male, sometimes as a female. A Getheian can both sire and bear children. Now, whether this invention strikes one as peculiar, or perverse, or fascinating, it certainly doesn’t require a great scientific intellect to grasp it, or to follow its implications as they’re played out in the novel.
Another element in the same book is the climate of the planet, which is deep in an ice age. A simple idea: It’s cold; it’s very cold; it’s always cold. Ramifications, complexities, and resonance come with the detail of imagining.
The Left Hand of Darkness differs from a realistic novel only in asking the reader to accept, pro tem, certain limited and specific changes in narrative reality. Instead of being on Earth during an interglacial period among two-sexed people, (as in, say, Pride and Prejudice, or any realistic novel you like), we’re on Gethen during a period of glaciation among androgynes. It’s useful to remember that both worlds are imaginary.
Science-fictional changes of parameter, though they may be both playful and decorative, are essential to the book’s nature and structure; whether they are pursued and explored chiefly for their own interest, or serve predominantly as metaphor or symbol, they’re worked out and embodied novelistically in terms of the society and the characters’ psychology, in description, action, emotion, implication, and imagery. The description in science fiction is likely to be somewhat “thicker,” to use Clifford Geertz’s term, than in realistic fiction, which calls on an assumed common experience. The description in science fiction is likely to be somewhat “thicker,” to use Clifford Geertz’s term, than in realistic fiction, which calls on an assumed common experience. All fiction offers us a world we can’t otherwise reach, whether because it’s in the past, or in far or imaginary places, or describes experiences we haven’t had, or leads us into minds different from our own. To some people this change of worlds, this unfamiliarity, is an insurmountable barrier; to others, an adventure and a pleasure. "
― Ursula K. Le Guin , A Fisherman of the Inland Sea (Hainish Cycle, #6.6)