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. "Winner of the 2011 Award for Excellence in Biology & Life Sciences, Association of American Publishers" "One of Choice's Outstanding Academic Titles for 2012" "[Patricia Churchland] finds that morality is all about empathy. . . . Churchland is also 'biological' about morality, seeing it as an adaptation that our brains have evolved in order to cement social ties. With a series of examples, she rejects the idea that morality is a set of rules and codes handed down from on high, without which we would all behave badley." ---Matt Ridley, Wall Street Journal "Churchland's discussion puts . . . areas of research prone to over-interpretation into much-needed perspective. . . . In my view, by illuminating the biological foundations on which caring, cooperation and social understanding are based, and by arguing against simplistic views about innateness and divine ordination, Churchland has delineated the conceptual space still to be navigated concerning which actions are morally right, how we come to those decisions, and how we justify them." ---Adina L. Roskies, Nature "Churchland provides an important service in Braintrust by applying recent scientific research to moral concerns." ---Richard S. Mathis, Science "Intriguing. . . . The puzzle that concerns [Churchland] above all is whether morality can be explained or justified by science." ---Margaret A. Boden, Times Higher Education "Churchland's superbly written, dense-with-thinking book is fiercely alert to what can and cannot justifiably be inferred from modern science. She is a brilliantly precise (and often slyly funny) demolisher of exaggerated claims (both in popular literature and research papers) about the hormone oxytocin, mirror neurons, 'genes for' behaviours, 'innate' capacities, or the functions of particular brain structures. The nuggets that survive her skepticism form the suggestive scaffolding of her own hypothesis: mammals came to regard their young as part of themselves (so recognizing the babies' distress or hunger), and then widened this 'me-and-mine' concern to extended family and others." ---Steven Poole, The Guardian "Churchland, by insisting that morality is neither an innate instinct nor an abstract system, but rather a tough, practical problem posed by our instincts, is bringing together the best in both neuroscientific and philosophical thinking." ---Josh Rothman, Boston Globe's Brainiac blog "What is morality? Where does it come from? According to neurophilosopher Patricia S. Churchland in her book Braintrust , morality originates in the brain. She argues that over time the human brain evolved to feel social pain and pleasure. As humans evolved to care about the wellbeing of others, they also developed a sense of morality." ---Victoria Stern, Scientific American Mind "Churchland guides the reader through lucid, well-articulated explanations of subjects like oxytocin's effect on an individual's hormonal makeup, brain changes over time, and relevant gene research, tying these neuroscientific elements together with more social science oriented areas like cooperation, trust, and rule creation. . . . In bringing together aspects of philosophy and neuroscience, Churchland presents a persuasive argument that morality is not shaped solely by religious or social forces but, instead, also draws on hormonal triggers, genes, and brain evolution. This influential work is likely