In his characteristically provocative fashion, Dennett, author of Darwin's Dangerous Idea and director of the Center for Cognitive Studies at Tufts University, calls for a scientific, rational examination of religion that will lead us to understand what purpose religion serves in our culture. Much like E.O. Wilson (In Search of Nature), Robert Wright (The Moral Animal), and Richard Dawkins (The Selfish Gene), Dennett explores religion as a cultural phenomenon governed by the processes of evolution and natural selection. Religion survives because it has some kind of beneficial role in human life, yet Dennett argues that it has also played a maleficent role. He elegantly pleads for religions to engage in empirical self-examination to protect future generations from the ignorance so often fostered by religion hiding behind doctrinal smoke screens. Because Dennett offers a tentative proposal for exploring religion as a natural phenomenon, his book is sometimes plagued by generalizations that leave us wanting more ("Only when we can frame a comprehensive view of the many aspects of religion can we formulate defensible policies for how to respond to religions in the future"). Although much of the ground he covers has already been well trod, he clearly throws down a gauntlet to religion. ~ Publishers Weekly

This book shows how Darwinian biology supports an Aristotelian view of ethics as rooted in human nature. Defending a conception of "Darwinian natural right" based on the claim that the good is the desirable, the author argues that there are at least twenty natural desires that are universal to all human societies because they are based in human biology. The satisfaction of these natural desires constitutes a universal standard for judging social practice as either fulfilling or frustrating human nature, although prudence is required in judging what is best for particular circumstances. The author studies the familial bonding of parents and children and the conjugal bonding of men and women as illustrating social behavior that conforms to Darwinian natural right. He also studies slavery and psychopathy as illustrating social behavior that contradicts Darwinian natural right. He argues as well that the natural moral sense does not require religious belief, although such belief can sometimes reinforce the dictates of nature.