'A masterful account of emotional development during the early years. It is an enormous challenge to provide an integrated picture of our current knowledge concerning the increasingly organized complexity that takes place in this area. Sroufe has done just that. In lucid prose, rich with examples, a coherent story is told from a developmental systems perspective. Using a central concept of regulation, the author also includes key aspects of cognitive, social, and physiological development, as well as particular aspects of attachment. As the reader would expect, the author's extensive experience and insights from longitudinal and experimental work carried out over nearly three decades is included. A strong clinical perspective is also evident; dimensions of individuality, meaning, and adaptation are pervasive.' Robert N. Emde, University of Colorado