Subtitled: Ethics, Evolution, and Moral Progress.
(First published 1981. This edition, with a new preface and afterword: Princeton University Press, 2011, xviii + 208pp, including 35pp of notes on sources, afterword, and index.)

I had thought this book was about a particular famous idea attributed to Singer: that the ‘expanding circle’ of moral concern or empathy might extend even beyond fellow human beings to animals, at least to some degree. And maybe someday to AI. But the book is much more: in its extension of E.O. Wilson’s ideas in his 1975 book SOCIOBIOLOGY, and it’s a good sketch of how we understand human nature in light of evolution and the heredity environment.
And coincidentally, it’s a corrective to the simplistic theological thinking of C.S. Lewis. It’s a good primer into some of what we understand about the origins of human nature. And also coincidentally, it dovetails with some of the ideas in the Todd May book I read just before this.
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