times so imperfectly understood the events of the great French Revolution is, that it never occurred to him to study the genius of crowds. He took as his guide in the study of this complicated period the descriptive method resorted to by naturalists; but the moral forces are almost absent in the case of the phenomena which naturalists have to study. Yet it is precisely these forces that constitute the true mainsprings of history.
In consequence, merely looked at from its practical side, the study of the psychology of crowds deserved to be attempted. Were its interest that resulting from pure curiosity only, it would still merit attention. It is as interesting to decipher the motives of the actions of men as to determine the characteristics of a mineral or a plant. Our study of the genius of crowds can merely be a brief synthesis, a simple summary of our investigations. Nothing more must be demanded of it than a few suggestive views. Others will work the ground more thoroughly. To-day we only touch the surface of a still almost virgin soil.