 Some authors have extended concern for individual well-being further, arguing for the intrinsic value of organisms achieving their own good, whether those organisms are capable of consciousness or not. Paul Taylor’s version of this view (1981 and 1986), which we might call biocentrism, is a somewhat deontological example. He argues that each individual living thing in nature—whether it is an animal, a plant, or a micro-organism—is a “teleological-center-of-life” having a good or well-being of its own which can be enhanced or damaged, and that all individuals who are teleological-centers-of life have equal intrinsic value (or what he calls “inherent worth”) which entitles them to moral respect. Furthermore, Taylor maintains that the intrinsic value of wild living things generates a prima facie moral duty on our part to preserve or promote their goods as ends in themselves, and that any practices which treat those beings as mere means and thus display a lack of respect for them are intrinsically wrong. For a summary and overview of Taylor’s biocentric ethic, see Brennan and Lo 2010, 69—86. A biologically detailed defence of the idea that living things have representations and goals and hence have moral worth is found in Agar 2001. Unlike Taylor’s egalitarian and deontological biocentrism, Robin Attfield (1987) argues for a hierarchical view that while all beings having a good of their own have intrinsic value, some of them (e.g., persons) have intrinsic value to a greater extent. Attfield also endorses a form of consequentialism which takes into consideration, and attempts to balance, the many and possibly conflicting goods of different living things (see also Varner 1998 for a defense of biocentric individualism with affinities to both consequentialist and deontological approaches). However, some critics have pointed out that the notion of biological good or well-being is only descriptive not prescriptive (see Williams 1992 and O’Neill 1993, Ch. 2). For instance, even if HIV has a good of its own this does not mean that we ought to assign any positive moral weight to the realization of that good.