Carroll Izard’s theoretical and research contributions to the study of early socioemotional development are profiled. His studies of early emotional expression and the formulations of differential emotions theory have stimulated contemporary inquiry into the organization of early emotional life, the developmental processes by which distinct feelings and facial expressions become progressively concordant, and how the emotional expressions of others become imbued with emotion meaning. His work on emotion, attachment, and emotion–cognition relations has contributed to contemporary study of the emotional bases (...) of attachment organization and the development of the internal working models associated with attachment security. Because of Izard’s contributions, developmental emotions research is theoretically richer, and emotion has a more central place in our understanding of development and motivation. (shrink)