As a career sociologist I ?rst became interested in neurosociology around 1987 when a graduate student lent me Michael Gazzaniga s The Social Brain. Ifthe biological human brain was really social, I thought sociologists and their students should be the ?rst, not the last, to know. As I read on I found little of the clumsy reductionism of the earlier biosociologists whom I had learned to see as the arch- emy of our ?eld. Clearly, reductionism does exist among many neuroscientists. But I also found some things that were very social and quite relevant for sociology. After reading Descarte s...