In my first book I examined the tension between faith and reason in Descartes and argued that reason alone is insufficient to ground ethical commitments. In my books on nonhuman animals, I have applied this insight to argue for the need to acknowledge the fundamental animality of humans and our felt kinship with nonhuman animals. My most recent book is entitled What We Owe to Nonhuman Animals: The Historical Pretensions of Reason and the Ideal of Felt Kinship, published by Routledge. In this book I present a critique of historical and contemporary conceptions of reason in the Western philosophical tradition, and I propose in their place an ethic of deep humility on the part of human beings and an ideal of kinship that includes an acknowledgment of the full and direct moral status of nonhuman animals.
Links to the books in Amazon:
What We Owe to Nonhuman Animals
Animals and the Limits of Postmodernism