Bringing together experts in the philosophy, theory and history of psychology, this publication analyzes works of monumental impact and examines what separates some of the most influential psychological works from those that are less successful. Evaluating the careers of eminent scholars and practitioners like Freud, Lewin, James and Binet, this volume identifies and describes particularly important works, pinpoints specific attributes that led to great impact, and offers practical advice to students and professionals striving to achieve substantial impact in their own work.