Rapyuta was a factory world located on the edge of the Inner Rim. It was notable for its heavily stratified society, wherein the upper classes, made up mostly of intellectuals and philsophers, lived in floating cities, like the planet's capital, Tenkushiro, while the lower classes, consisting of the planet's entire labor force, lived in clustered towns on the planet's surface. Though the upper classes were very bright and knowledgeable about science and mathematics, they were notoriously irrational, and were heavily reliant upon the lower classes to provide supplies and labor for them. They kept control over the laborers by moving their floating cities over any towns where the citizenry misbehaved, thus preventing those towns from receiving sunlight and rain.