The Jumerians are a relatively peaceful species and genetic cousins of the Ingavi. Many years ago, a species called the Peladon discovered that a majority of the population that was technologically advancing was polluting the area of a more primitive species that was their genetic ancestors, the Ingavi. The Peladon placed an energy barrier to act as a shield around the Ingavi area, protecting them from the Jumerians. For centuries, the Jumerians had tried everything to penetrate the field without success. Today, the Jumerians live in large space stations orbiting their homeworld.