In Marubo cosmology, new entities are formed through the aggregation or transformation of parts of dead and mutilated beings. In just the same way, the Marubo people seem to have resulted from the re-organization of indigenous societies decimated and fragmented by rubber tappers at the height of the rubber boom. But this movement of dispersion and regrouping may well extend back into more ancient times, since the names of Marubo sections appear among other neighbouring Pano peoples.