The Casitian Universe is set in our galaxy, in particular, the stars of the Orion Arm. It is known by the “Galactics” (those that make up the civilization of the galaxy) that there are other civilizations in different parts of the larger galaxy, but they are not much in contact. Some species (particularly those species banned from galactic civilization because of problematic behavior) are in contact with a very ruthless civilization in the Centaurus Arm. The galactic community is made of a number of different species, and many, many star systems that are tied together by a series of wormholes that were created by a species that is no longer in the galaxy. The wormholes are maintained by a species called the Keeelo.
Five thousand years ago, ten thousand human beings were taken from earth, from twelve different regions, to provide slave labor for the Tud'scla, a species banned from the galactic community. Humans served the Tud'scla for two thousand years, and then were freed, and given the planet “Casiti” to live on, since returning the now 50 million humans to earth was considered by the Galactic Community to be too disruptive to earth human culture. Bottlenose Dolphins are known by the galactics to be more intelligent, and more civilized than humans.