Jamieson's book challenges both the philosopher and the non-philosopher to explore what is involved in a consistent set of beliefs about how humans relate to animals and nature. He often shows that this consistency takes us to conclusions that many of us will be uncomfortable with. . . . All of his articles, two of which he has co-authored with Marc Bekoff and one with Tom Regan, exhibit a commendable clarity of writing, close argumentation and an accessible style. . . . Whether or not we fully agree with him on what constitutes moralitys progress, his book certainly constitutes progress in our understanding of morality.