Many people have tried to define science fiction. I like to call it the literature of exploration and change. While other genres obsess upon so-called eternal verities, SF deals with the possibility that our children may have different problems. They may, indeed, be different than we have been.
David BrinFor all its beauty, honesty, and effectiveness at improving the human condition, science demands a terrible price - that we accept what experiments tell us about the universe, whether we like it or not. It's about consensus and teamwork and respectful critical argument, working with, and through, natural law. It requires that we utter, frequently, those hateful words - 'I might be wrong.'
David Brin