 Kolers’ theory appeals to the notion of ‘plenitude’ to explain how a group can be attached to an area, and this seems like it ought to be able to adjudicate rival claims, and potentially limit the scope of territorial rights. Plenitude, for Kolers, involves (1) internal diversity, (2) external distinctness, each from the perspective of the claimants, and (3) feasible plans for maintaining these in perpetuity (Kolers 2009: 115). Plenitude is claimed to be value-neutral in the sense that it does not rest on a normatively contested theory of appropriate use, and is compatible with an ecologically sensitive commitment to keeping some areas in their natural state without reverting to common ownership in the sense of a libertarian free-for-all. 