James Mark Baldwin (1861-1934) was an American philosopher and psychologist who was educated at Princeton and who was one of the founders of the Department of Psychology at the university. He made important contributions to early psychology, psychiatry, and to the theory of evolution, but it was his contributions to developmental psychology which were the most important. His step-wise theory of cognitive development was a major influence on the later, and much more widelyknown, developmental theory of Jean Piaget. He was a co-founder of the Psychological Review, Psychological Monographs and Psychological Index. He was also the founding editor of the Psychological Bulletin. His works include: Handbook of Psychology (1890), Mental Development in the Child and the Race (1894), Social and Ethical Interpretations in Mental Development (1897), The Story of the Mind (1898), Thoughts and Things: A Study of the Development and Meaning of Thought (1906), Darwin and the Humanities (1909), The Individual and Society (1911), Genetic Theory of Reality (1915) and American Neutrality: Its Cause and Cure (1916).