He presents many of the major ideas and criticisms of animal rights, energy use, the land ethic, deep ecology, and ecofeminism. Particularly in the areas of deep ecology he presents the diversity of views. Perhaps he is weak in presenting third world views and the impact that "Deep ecology" might have on poor and agrarian populations. He is lacking discussion of religious based environmental ethics ("Theocentric ethics"). Christian Ecology seeks to develop a stewardship view, and Native American, and Eastern religions center on respect for nature. I think this book works best when read with selections from the authors discussed; for example read some of Leopold's "Sand County Almanac", then read the chapter on "The Land Ethic."