This volume adopts a unique, multidisciplinary approach to the study of the development of the human brain and early behavior. Evolutionary, neurological, genetic, psychological, linguistic, and cross-cultural studies of brain-behavior interactions in human development are integrated for the first time within a biosocial framework. Contributors draw upon both classic anatomical and modern physiological and biochemical techniques to chart postnatal brain development as well as comparative primate and human brain and behavior maturation.