Every society that is alien “Lumen” provides a review of life in the world. Each illustrates a finer, more peaceful and rational way of doing things by eliminating sex or nations or nepotism. That is among the earliest occupations practiced by fictional figures: illustrating how humans ought to act. Extraterrestrials, as it happens, are nearly as good at that task as some of the races that are bizarre by Lemuel Gulliver during their travels. These are not merely aliens we…