Gary L. Francione is a law professor and leading philosopher of animal rights theory. Robert Garner is a political theorist specializing in the philosophy and politics of animal protection. Francione maintains that we have no moral justification for using nonhumans and argues that because animals are property--or economic commodities--laws or industry practices requiring "humane" treatment will, as a general matter, fail to provide any meaningful level of protection. Garner favors a version of animal rights that focuses on eliminating animal suffering and adopts a protectionist approach,...