Positive psychology insists that understanding what works in people’s lives is just as important as understanding the things that can go wrong. Whereas traditional approaches in psychology have tended to focus on the alleviation of stress, struggle, and other negative symptoms, positive psychology is instead concerned with the sources of human thriving and flourishing. The goal in this issue is to advance this translational process, by showing new ways in which positive psychology is being put to work. In summary, this special issue highlights a broad sampling of research programs that are translating positive psychology theory and findings into applied settings and practical results. As the articles clearly illustrate, Positive Psychology is rapidly becoming a mature science— one increasingly positioned to help improve the human condition, in a wide variety of ways and life domains. (PsycINFO Database Record (c) 2018 APA, all rights reserved)