Positive psychology is the scientific study of the strengths, rather than the weaknesses, in human thoughts, feelings, and behaviors. For much of its history, psychology has focused on the negative, completely overlooking the positive attributes that allow individuals and communities to thrive. is a collection of essays that together constitutes a much-needed theoretical rationale and critical assessment of the field. This book reassesses what we already know and provides directions for the future. Contributors are leading international authors, including Mihaly Csikszentmihalyi, Robert Sternberg, Vittorio Caprara, C. Daniel Batson, and Illona Boniwell, among others. These luminaries write in a way that is rigorous enough for academic use but accessible to professionals, policymakers, and lay audiences as well. The content of include both theoretical applied contributions focusing on a range of areas including altruism, positive creativity, science of well-being, forgiveness, coaching for leadership, cyberpsychology, intelligence, responding to catastrophes like COVID-19, time perspective, physiological and epigenetic, youth civic engagement, ups and downs of love, flow and good life, global perspectives on positive psychology, self and collective efficacy, positive psychology interventions and positive orientation. The book is pitched to senior undergraduates, graduates, academics and researchers and provides insights and perspectives into neglected and unresolved questions. No other book currently on the market addresses such a breadth of issues in positive psychology. represents a significant theoretical boost to this exciting field.