The Inchoroi are a genetically-engineered weapon race. They were created by a species known only as the progenitors, apparently on another world many thousands and possibly tens of thousands of years ago. The progenitors achieved total technological and biological mastery but then discovered inarguable evidence (possibly through the creation of the Inverse Fire) that they were doomed to eternal damnation. The Inchoroi and the Incû-Holoinas were created to save them from this fate, presumably by reducing the number of living begins on other planets until the threat of damnation was lifted.
The fate of the progenitors is unknown. The Inchoroi themselves remember nothing of their origins; what scant information is known was extracted by Cet’ingira and the Dûnyain from the Ark over the course of many years.
The goal of the Inchoroi is to prevent the eventual eternal damnation of their souls by severing the connection between the World and the Outside. They believe this can be accomplished by reducing the number of souls in the world below 144,000. They attempted this on many other worlds, prevailing each time only to find themselves still damned, before the Incû-Holoinas crashed into Eärwa, which they view as the land of their redemption.