How can we motivate students, patients, employees, and athletes? What helps us achieve our goals, improve our well-being, and grow as human beings? Motivation and volition are issues that everyone grapples with in facing the challenges of everyday life. This unique and comprehensive book by leading international researchers takes a genuinely integrative view on motivation and volition from the perspective of personality systems interactions (PSI) theory of Julius Kuhl. This book is essential reading for all researchers, practitioners, coaches, educationalists, and students interested in motivating people.