Integrating psychological and philosophical research on virtue and moral development, this book presents a real-world program for virtue science. Offering empirically testable hypotheses, the chapters deliver theoretical and methodological guidance that shows how existing research can become a cohesive and truly interdisciplinary science of virtue. The authors' unique 'STRIVE-4 Model' defines a unifying conceptual framework, making the book an indispensable resource for a new generation of scholars and students. This empirically tested model provides the much-needed foundation that can put to rest traditional worries about moral science. While mapping out the relevant areas of psychology and value-focused inquiry, the book lays out an interdisciplinary approach to many questions, including the problem of knowledge about character. Written for those researching virtue drawing on personality, developmental, moral, and positive psychology, as well as moral philosophy and character education, the book demonstrates the importance and applications of studying virtues empirically.