Instincts of the Herd in Peace and War

London: Adelphi terrace sixth impression, 1921
Based on the ideas of Gustave Le Bon, it was very influential in the development of group dynamics and crowd psychology, and the propaganda of Edward Bernays.
A book devoted to the problems of civil society, its organization and political institutions. The general purpose of this book is to suggest that the science of psychology is not the mass of dreary and indefinite generalities of which it sometimes perhaps seems to be made up; to suggest that, especially when studied in relation to other branches of biology, it is capable of becoming a guide in the actual affairs of life and of giving an understanding of the human mind such as may enable us in a practical and useful way to foretell some of the course of human behaviour. The present state of public affairs gives an excellent chance for testing the truth of this suggestion, and adds to the interest of the experiment the strong incentive of an urgent national peril.Herd instinct and its bearing on the psychology of civilized man.
Introduction.
Psychological aspects of instinct.
Biological significance of gregariousness.
Mental characteristics of the gregarious animal.
Sociological applications of the psychology of herd instinct.
Gregariousness and the future of man.
Speculations upon the human mind in 1915.
Prejudice in time of war.
Psychological anticipations after the war.
The instability of civilization.
Some characters of a rational statecraft.