It is a paradox of Life that all species breed past mere replacement. Any paradise of plenty soon fills to become paradise no more.
David BrinSelf-righteous people can talk themselves into forgetting they are part of a civilization. They can then feed on that culture, bringing it down. It's happened many times in the past. It could happen to us.
David BrinMany 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 Brin