Dorwin Cartwright

Cartwright earned his Ph.D. in psychology from Harvard University in 1940, where he studied under Kurt Lewin, the pioneer of group dynamics. He later joined the faculty at the University of Michigan, where he became a central figure at the Research Center for Group Dynamics, which Lewin had founded. Cartwright's research focused on the structural properties of groups, including the bases of social power, the dynamics of conformity, and the conditions that foster group cohesiveness. His 1959 paper, "A Field Theoretical Conception of Power," proposed a systematic framework for understanding power in interpersonal and group contexts, influencing subsequent work in social psychology and organizational behavior.¹

Cartwright's most enduring contribution is the co-edited volume Group Dynamics: Research and Theory, first published in 1953 and revised in 1968. This anthology compiled seminal papers on group behavior, including studies on leadership, communication networks, and decision-making, and served as a primary textbook for a generation of social psychologists. He also co-authored Studies in Social Power (1959), which introduced the concept of the "bases of power" — a taxonomy that distinguished between coercive, reward, legitimate, referent, and expert power. This framework, later expanded by John French and Bertram Raven, remains a cornerstone in the study of social influence.²

Cartwright's work helped establish group dynamics as a rigorous empirical discipline, moving it beyond descriptive case studies toward testable theories. His emphasis on the interplay between individual psychology and social structure anticipated later developments in social network analysis and organizational psychology. He also served as president of the Society for the Psychological Study of Social Issues (SPSSI) and was a fellow of the American Psychological Association. His teaching and mentorship shaped the careers of numerous scholars, and his textbooks were widely adopted in university courses. The Research Center for Group Dynamics, now part of the University of Michigan's Institute for Social Research, continues to build on his foundational ideas.³

Beyond his academic work, Cartwright was involved in applied research during World War II, contributing to studies on morale and propaganda for the U.S. government. He was also an early advocate for the use of mathematical models in social psychology, collaborating with Frank Harary on graph-theoretic approaches to group structure. Cartwright's interest in power extended to international relations, and he wrote on the dynamics of conflict and cooperation. Despite his prominence, he remained a modest figure, often deflecting credit to his collaborators. His later years were devoted to writing and editing, and he continued to publish until the 1980s. His personal papers are archived at the Bentley Historical Library at the University of Michigan.⁴

Group dynamics

The study of the behavior of groups and the interactions among their members.

Bases of power

A classification of the sources of social power, including coercive, reward, legitimate, referent, and expert power.

Field theory

A psychological theory developed by Kurt Lewin that views behavior as a function of the person and the environment.