The Science of Early Moral Development: on Defining, Constructing, and Studying Morality from Birth.

The first 4 years of moral development are perhaps the most transformative. Helpless neonates become infants who routinely help and harm others; infants develop into preschoolers who make moral judgments based on moral concerns with welfare. Over the past two decades, there has been tremendous empirical progress, but also theoretical stalemates, in research on early moral development. To advance the field, this chapter argues for providing definitions of key terms, adopting an interactionist and constructivist approach (eschewing the dichotomy between innate and learned characteristics), and combining naturalistic and experimental methods. On this basis, the chapter reviews research on how children's orientations toward helping and harming others develop gradually through everyday social interactions in the early years. In these interactions, children play active roles through initiation, negotiation, protest, and construction. The chapter concludes with key questions for future research on early moral development.