their whole life with an unvarying character. It is only the uniformity of the environment that creates the apparent uniformity of characters. I have shown elsewhere that all mental constitutions contain possibilities of character which may be manifested in consequence of a sudden change of environment. This explains how it was that among the most savage members of the French Convention were to be found inoffensive citizens who, under ordinary circumstances, would have been peaceable notaries or virtuous magistrates. The storm past, they resumed their normal character of quiet, law-abiding citizens. Napoleon found amongst them his most docile servants.
It being impossible to study here all the successive degrees of organisation of crowds, we shall concern ourselves more especially with such crowds as have attained to the phase of complete organisation. In this way we shall see what crowds may become, but not what they invariably are. It is only in this advanced phase of organisation that certain new and special characteristics are superposed on the unvarying and dominant character of the race; then takes place that turning already alluded to of all the feelings and thoughts of the collectivity in an identical direction. It is only under such circumstances, too, that what I have called above the PSYCHOLOGICAL LAW OF THE MENTAL UNITY OF CROWDS comes into play.
Among the psychological characteristics of crowds there are some that they may present in common with isolated individuals, and others, on the contrary, which are absolutely peculiar to them and are only to be met with in collectivities. It is these special characteristics that we shall study, first of all, in order to show their importance.
The most striking peculiarity presented by a psychological crowd is the following: Whoever be the individuals that compose it, however like or