animals nils holtug kasper lippert rasmussen eds ''egalitarianism new essays nature value equality'' oxford university press walker stephen ''animal thoughts'' routledge weir jack virtue ethics marc bekoff ''encyclopedia animal rights animal welfare'' greenwood williams erin e demello margo ''why animals matter'' prometheus books wise steven ''rattling cage toward legal rights animals'' da capo press wise steven ''drawing line science case animal rights'' perseus wise steven animal rights one step time sunstein
Humanities Philosophy Ethics Animal rights