This text's primary theme is that of respectful, responsive, and reciprocal adult-infant-toddler interactions. That theme informs the text's framework of Ten Principles, introduced in Chapter 1. The Principles are referred to in every chapter and are reinforced through a recurring Principles in Action feature that demonstrates individual principles. This text features well-established practices related to sensitive care and program planning, designed to promote well-being and identity formation in infants and toddlers. The focus of Infants, Toddlers, and Caregivers is on action - putting theory into practice. The authors appreciate that even people with considerable understanding of early development may struggle unless they have also learned to apply that theory. Appreciating diversity, cultural and linguistic differences, and inclusion have grown in significance with each edition, and are reflected in positive, non-biased terminology throughout the text and its support resources.