A Dynamic Theory of Personality: Selected Papers

Lewin's central argument is that psychology must replace Aristotelian conceptual habits—classification by abstract averages, explanation through fixed essences, and the search for laws based on frequency—with a Galilean approach that derives behavior from the concrete, momentary field of forces constituting a person's life space. He rejects the assumption that dynamics are determined by inherent properties of a person or object and the consequent search for uniform characteristics of abstractly defined classes. Instead, he insists on taking the individual case seriously and analyzing the lawful relations among forces in a specific situation. The opening chapter, 'The Conflict between Aristotelian and Galilean Modes of Thought in Contemporary Psychology,' is the definitive statement of this methodological position .

The book brought Lewin's concept of the 'life space'—the totality of psychological facts that determine behavior at a given moment—to American readers in systematic form. It also introduced his Galilean methodology to English-speaking audiences for the first time. As Hadley Cantril observed in a 1936 review, the volume finally made available in convenient form contributions of Lewin and his pupils that had been widely scattered across German journals and edited volumes . The chapters on reward and punishment and on substitute activity analyzed Berlin experiments in greater detail than had previously been accessible in English, and the feeblemindedness chapter demonstrated the application of Gestalt theory to a domain far from perception.

Hadley Cantril, reviewing the book in The Journal of Abnormal and Social Psychology in 1936, made this observation directly: as the topic of personality is generally understood in American psychology, this book is not a dynamic theory of personality . The volume is a collection of eight previously published papers rather than a systematic treatise, and personality as a unitary construct receives less attention than the methodological critique and the analysis of motivational dynamics. Robert Sears similarly noted in Psychological Bulletin that the book was intended as a summary of Lewin's systematic position but is composed of independently written articles . The title reflects Lewin's broader project of theorizing dynamics, not a conventional personality psychology text.

Robert Leeper's 1943 digest observed that A Dynamic Theory of Personality, though a heterogeneous collection, remained one of the most useful of Lewin's writings because it illustrated so well the experimental hypotheses growing out of his general concepts—but as an explanation of his whole system, it was brief and incomplete . The essays were originally published between 1927 and 1933, before much of Lewin's conceptual apparatus had been fully developed. His 1936 Principles of Topological Psychology attempted a more systematic treatment but was itself premature, presenting only the framework of possible events without the vector concepts needed to determine which events actually occur. The 1935 collection thus records the experimental origins of a theoretical system that would be elaborated in later volumes.

Leeper's critique noted that Lewin's theoretical contributions aroused both interest and perplexity, and that the 1936 topological volume served mainly to increase the perplexity of psychologists regarding the system's value . The book's method of representing life situations through topology was difficult to evaluate pragmatically, and no one attempted more than a logical evaluation of its definitions. Sears's 1936 review also questioned the coherence of Lewin's claim that his emphasis on changing organism-environment relationships makes his system dynamic while behaviorism is static, calling the distinction hard to see . More broadly, M. Brewster Smith later argued that while Lewin's Galilean essay was a breath of fresh air for a generation of psychologists, the hermeneutic and contextualist critique of positivism should leave us dissatisfied with Lewin's version of a Galilean strategy .

Lewin's critique of Aristotelian classification and his insistence on the concrete situation influenced a generation of psychologists. M. Brewster Smith recalled the opening chapter as standing out saliently as having a large part in forming his enduring perspective, noting that he and many others had absorbed its content and built it into the fabric of their thought . However, Smith also argued that post-positivist developments left Lewin's Galilean strategy insufficient, calling for a culturally and historically contextualized approach that goes beyond the physicalist tradition Lewin represented. The book's specific experimental findings, such as the work on substitute activity and reward-punishment situations, generated a number of follow-up studies, while the broader topological apparatus received more logical scrutiny than experimental application.