This volume provides a multi—disciplinary perspective on grit, its measurement, manifestation and development. Specifically, it provides a comprehensive and balanced response to critiques associated with the construct within the contemporary positive psychological literature. These critiques revolve around the lack of consensus in the conceptualisation, measurement, and management of grit, as well as consensus on its difference from other psychological constructs such as conscientiousness, diligence or determination. Therefore, this volume thoroughly reappraises and consolidates the nature, function, measurement and implications of grit in order to effectively advance the science of achievement. It looks at grit scales developed in various countries and evaluates the concept in various aspects of life, from work performance to sports. Written by a team of multi—disciplinary experts in fields ranging from neuroscience, sociology, and education to human resource management and psychology, this volume firmly positions grit within the discipline of positive psychology’s nomological lexicon.