Johnson defends a “deep” environmental ethic: everything capable of interests shares the same “moral universe”; since species, ecosystems, and the entire biosphere have interests as well as all living things, all share the same moral universe. Lives and systems must therefore be valued in proportion to the interests inherent within them. Not only does Johnson attack a leading critic, R.G. Frey (Interests and Rights: The Case Against Animals, CH, Nov\u2780), he distances himself from other well-known defenders of environmental ethics, such as Robin Attfield (The Ethics of Environmental Concern, CH, Jun\u2784), Peter Singer (Animal Liberation, 2nd ed., 1991; 1st ed., CH, May\u2776), and Tom Regan (All That Dwell Therein: Essays on Animal Righ...