A provocative new account of how morality evolved What is morality? Where does it come from? And why do most of us heed its call most of the time? In Braintrust, neurophilosophy pioneer Patricia Churchland argues that morality originates in the biology of the brain. She describes the "neurobiological platform of bonding" that, modified by evolutionary pressures and cultural values, has led to human styles of moral behavior. The result is a provocative genealogy of morals that asks us to reevaluate the priority given to religion, absolute rules, and pure reason in accounting for the basis of morality. Moral values, Churchland argues, are rooted in a behavior common to all mammals—the caring for offspring. The evolved structure, processes, and chemistry of the brain incline humans to strive not only for self-preservation but for the well-being of allied selves—first offspring, then mates, kin, and so on, in wider and wider "caring" circles. Separation and exclusion cause pain, and the company of loved ones causes pleasure; responding to feelings of social pain and pleasure, brains adjust their circuitry to local customs. In this way, caring is apportioned, conscience molded, and moral intuitions instilled. A key part of the story is oxytocin, an ancient body-and-brain molecule that, by decreasing the stress response, allows humans to develop the trust in one another necessary for the development of close-knit ties, social institutions, and morality. A major new account of what really makes us moral, Braintrust challenges us to reconsider the origins of some of our most cherished values.

The Arthur M. Sackler Colloquia of the National Academy of Sciences address scientific topics of broad and current interest, cutting across the boundaries of traditional disciplines. Each year, four or five such colloquia are scheduled, typically two days in length and international in scope. Colloquia are organized by a member of the Academy, often with the assistance of an organizing committee, and feature presentations by leading scientists in the field and discussions with a hundred or more researchers with an interest in the topic. Colloquia presentations are recorded and posted on the National Academy of Sciences Sackler colloquia website and published on CD-ROM. These Colloquia are made possible by a generous gift from Mrs. Jill Sackler, in memory of her husband, Arthur M. Sackler.

Table of contents

First published in 1987, this book discusses the life and natural history of moral systems as seen through the eyes of a biologist. The volume offers a comprehensive introspective of the biology of a moral system by examining the evolutionary approach from perspectives of sociobiology and ideology. Morality in relation to conflicts and confluences of interest among humankind are further evaluated, with particular emphasis on the human psyche and the ontogeny of moral behaviour. Philosophical meets biological with insightful commentary on the morality of law and democracy. The book concludes with an epilogue, bibliography and name and subject index. It is clear, concise and contemporary and would be of use to those studying Biology, Philsophy and many other social sciences.

In The Evolution of Moral Progress, Allen Buchanan and Russell Powell resurrect the project of explaining moral progress. They avoid the errors of earlier attempts by drawing on a wide range of disciplines including moral and political philosophy, evolutionary biology, evolutionary psychology, anthropology, history, and sociology. Their focus is on one especially important type of moral progress: gains in inclusivity. They develop a framework to explain progress in inclusivity to also illuminate moral regression--the return to exclusivist and "tribalistic" moral beliefs and attitudes. Buchanan and Powell argue those tribalistic moral responses are not hard-wired by evolution in human nature. Rather, human beings have an evolved "adaptively plastic" capacity for both inclusion and exclusion, depending on environmental conditions. Moral progress in the dimension of inclusivity is possible, but only to the extent that human beings can create environments conducive to extending moral standing to all human beings and even to some animals. Buchanan and Powell take biological evolution seriously, but with a critical eye, while simultaneously recognizing the crucial role of culture in creating environments in which moral progress can occur. The book avoids both biological and cultural determinism. Unlike earlier theories of moral progress, their theory provides a naturalistic account that is grounded in the best empirical work, and unlike earlier theories it does not present moral progress as inevitable or as occurring in definite stages; but rather it recognizes the highly contingent and fragile character of moral improvement.