Arne Naess and Paul Taylor are two of the most forceful proponents of
the principle of species equality. Problematically, both, when adjudic
ating conflict of interest cases, resort to employing explicit or impl
icit species-ranking arguments. I examine how Lawrence Johnson's criti
cal, species-ranking approach helpfully avoids the normative inconsist
encies of ''biospherical egalitarianism.'' Many assume species-ranking
schemes are rooted in arrogant, ontological claims about human, prima
te, or mammalian superiority. Species ranking, I believe, is best view
ed as a justified articulation of moral priorities in response to indi
viduals' or entities' relative ranges of vulnerability and need, roote
d in their relative ranges of capacities and interests.