The brain sciences are influencing our understanding of human behavior as never before, from neuropsychiatry and neuroeconomics to neurotheology and neuroaesthetics. Many now believe that the brain is what makes us human, and it seems that neuroscientists are poised to become the new experts in the management of human conduct. Neuro describes the key developments--theoretical, technological, economic, and biopolitical--that have enabled the neurosciences to gain such traction outside the laboratory. It explores the ways neurobiological conceptions of personhood are influencing everything from child rearing to criminal justice, and are transforming the ways we know ourselves as human beings. In this emerging neuro-ontology, we are not determined by our neurobiology: on the contrary, it appears that we can and should seek to improve ourselves by understanding and acting on our brains. Neuro examines the implications of this emerging trend, weighing the promises against the perils, and evaluating some widely held concerns about a neurobiological colonization of the social and human sciences. Despite identifying many exaggerated claims and premature promises, Neuro argues that the openness provided by the new styles of thought taking shape in neuroscience, with its contemporary conceptions of the neuromolecular, plastic, and social brain, could make possible a new and productive engagement between the social and brain sciences. Copyright note: Reproduction, including downloading of Joan Miro works is prohibited by copyright laws and international conventions without the express written permission of Artists Rights Society (ARS), New York.