This groundbreaking handbook of human strengths and virtues is the first progress report from a prestigious group of researchers in the Values in Action Classification Project, which has undertaken a systematic classification and measurement of universal strengths and virtues. This landmark work makes possible for the first time a science of human strengths that goes beyond armchair philosophy and political science. The handbook begins with the background of the VIA classification scheme and defines terms before describing in thorough detail the current state of knowledge with respect to each of the 24 character strengths in the classification. Addressing issues of assessment and measurement, practical applications, and directions for future research, this work will demand the attention of any psychologist who is interested in positive psychology and its relevance to clinical, personality, and social psychology.