''The Expanding Circle: Ethics and Sociobiology'' is a 1981 book by

Peter Singer Peter Albert David Singer (born 6 July 1946) is an Australian moral philosopher, currently the Ira W. DeCamp Professor of Bioethics at Princeton University. He specialises in applied ethics and approaches ethical issues from a secular, ...

bridging the topics of

sociobiology Sociobiology is a field of biology that aims to examine and explain social behavior in terms of evolution. It draws from disciplines including psychology, ethology, anthropology, evolution, zoology, archaeology, and population genetics. Within t ...

and

ethics Ethics or moral philosophy is a branch of philosophy that "involves systematizing, defending, and recommending concepts of right and wrong behavior".''Internet Encyclopedia of Philosophy'' The field of ethics, along with aesthetics, concerns ...

Arguments

The central tenet of the book is that over the course of human history, people have expanded the circle of beings whose interests they are willing to value similarly to their own. Originally that circle would have been self, family and tribe, but over time it grew to encompass all other humans. In the book, Singer argues that the circle should be expanded to include most animals: ''The Expanding Circles longest chapter concerns the relationship between

reason Reason is the capacity of Consciousness, consciously applying logic by Logical consequence, drawing conclusions from new or existing information, with the aim of seeking the truth. It is closely associated with such characteristically human activ ...

and ethics. Singer discusses the relationship between biological capacity for altruism and morality. He argues that altruism, when directed to one's small circle of family, tribe or even nation, is not moral, but it becomes so when applied to wider circles. This happens because of human capacity for reason, which "generalizes or universalizes" our altruistic tendencies beyond groups we are biologically inclined to be altruistic to. As such, reason is not the opposite of emotions and instincts but instead builds on it. Hence the book title, the "expanding circle", with the circle being our consideration of whom we can be altruistic to, and the reason for its expansion, reason – a product of both ethics and sociology.

Reception

One reviewer noted that the book is "a remarkable and worthwhile synthesis of the

neo-Kantian In late modern continental philosophy, neo-Kantianism (german: Neukantianismus) was a revival of the 18th-century philosophy of Immanuel Kant. The Neo-Kantians sought to develop and clarify Kant's theories, particularly his concept of the "thing ...

of the Harvard moral philosopher

John Rawls John Bordley Rawls (; February 21, 1921 – November 24, 2002) was an American moral, legal and political philosopher in the liberal tradition. Rawls received both the Schock Prize for Logic and Philosophy and the National Humanities Medal ...

and the

of Harvard's

E. O. Wilson Edward Osborne Wilson (June 10, 1929 – December 26, 2021) was an American biologist, naturalist, entomologist and writer. According to David Attenborough, Wilson was the world's leading expert in his specialty of myrmecology, the study of a ...

". Singer's book was indeed seen as one of the responses to Wilson’s 1975 work, '' Sociobiology: The New Synthesis'', which argued that understanding ethics can be reduced to understanding our

sociobiological Sociobiology is a field of biology that aims to examine and explain social behavior in terms of evolution. It draws from disciplines including psychology, ethology, anthropology, evolution, zoology, archaeology, and population genetics. Within t ...

programming. While Wilson's work was at first ignored by moral philosophers, generally seen as controversial and even described as "arrogant", Singer was one of the first moral philosophers to constructively engage with it, arguing that at least some of sociobiology's arguments in general and Wilson's arguments in particular are valuable for further development of our understanding of the field of ethics (also known as moral philosophy).

Editions

A new edition, published in 2011, includes a new afterword by Singer. In it, the author discusses how recent progress in biology and genetics have influenced his thinking, and how it reinforces his original theory.

Arguments

Reception

Editions

See also

References

Further reading