A morality "based on the study of human nature instead of upon disregard for it" is the focus of this influential work by one of America's greatest educators and philosophers. Dewey maintains that the key to social psychology lies in an understanding of the many varieties of habit; individual mental activity, on the other hand, is guided by the subordinate factors of impulse and intelligence. His investigation therefore focuses on three main areas of conduct: habit, impulse, and intelligence. Each factor receives an incisive treatment, brimming with ideas, insights, and considered reflections sure to be appreciated by educators, psychologists, philosophers, and anyone interested in the role of the individual in society. Unabridged republication of the classic 1922 edition.