A Pirate's Life
This plane is made up mostly of water. Small points of land mark what bastions of civilization survive in this world. The first planar travelers to arrive here named the plane Aquos. They thought it an ironic name until they tried to leave.
Those travelers and all those who have come since have discovered that Aquos is an easy enough plane to get to. But it is nearly impossible to leave. The travelers eventual resigned themselves to settling what land exists. As more travelers arrived they began to split into factions.
As more and more people arrived the population splintered into many factions. However, most factions either don’t last or don’t garner large numbers of followers. Five factions stood both the test of time and garnered the support of large segments of the population: Imperials, Calderi, Treeborn, Scrappers, and (of course) Pirates.