accidentally gathered in a public place without any determined object in no way constitute a crowd from the psychological point of view. To acquire the special characteristics of such a crowd, the influence is necessary of certain predisposing causes of which we shall have to determine the nature.

The disappearance of conscious personality and the turning of feelings and thoughts in a definite direction, which are the primary characteristics of a crowd about to become organised, do not always involve the simultaneous presence of a number of individuals on one spot. Thousands of isolated individuals may acquire at certain moments, and under the influence of certain violent emotions—such, for example, as a great national event—the characteristics of a psychological crowd. It will be sufficient in that case that a mere chance should bring them together for their acts to at once assume the characteristics peculiar to the acts of a crowd. At certain moments half a dozen men might constitute a psychological crowd, which may not happen in the case of hundreds of men gathered together by accident. On the other hand, an entire nation, though there may be no visible agglomeration, may become a crowd under the action of certain influences.

A psychological crowd once constituted, it acquires certain provisional but determinable general characteristics. To these general characteristics there are adjoined particular characteristics which vary according to the elements of which the crowd is composed, and may modify its mental constitution. Psychological crowds, then, are susceptible of classification; and when we come to occupy ourselves with this matter, we shall see that a heterogeneous crowd—that is, a crowd composed of dissimilar elements—presents certain characteristics in common with homogeneous crowds—that is, with crowds composed of elements more or less akin (sects, castes, and classes)—and side by side with these common characteristics particularities which permit of the two kinds of crowds being differentiated.

But before occupying ourselves with the different categories of crowds, we must first of all examine the characteristics common to them all. We shall set to work like the naturalist, who begins by describing the general characteristics common to all the members of a family before concerning himself with the particular characteristics which allow the differentiation of the genera and species that the family includes.

It is not easy to describe the mind of crowds with exactness, because its organisation varies not only according to race and composition, but also according to the nature and intensity of the exciting causes to which crowds are subjected. The same difficulty, however, presents itself in the psychological study of an individual. It is only in novels that individuals are found to traverse 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 unlike be their mode of life, their occupations, their character, or their intelligence, the fact that they have been transformed into a crowd puts them in possession of a sort of collective mind which makes them feel, think, and act in a manner quite different from that in which each individual of them would feel, think, and act were he in a state of isolation. There are certain ideas and feelings which do not come into being, or do not transform themselves into acts except in the case of individuals forming a crowd. The psychological crowd is a provisional being formed of heterogeneous elements, which for a moment are combined, exactly as the cells which constitute a living body form by their reunion a new being which displays characteristics very different from those possessed by each of the cells singly.

Contrary to an opinion which one is astonished to find coming from the pen of so acute a philosopher as Herbert Spencer, in the aggregate which constitutes a crowd there is in no sort a summing-up of or an average struck between its elements. What really takes place is a combination followed by the creation of new characteristics, just as in chemistry certain elements, when brought into contact—bases and acids, for example—combine to form a new body possessing properties quite different from those of the bodies that have served to form it.

It is easy to prove how much the individual forming part of a crowd differs from the isolated individual, but it is less easy to discover the causes of this difference.

To obtain at any rate a glimpse of them it is necessary in the first place to call to mind the truth established by modern psychology, that unconscious phenomena play an altogether preponderating part not only in organic life, but also in the operations of the intelligence. The conscious life of the mind is of small importance in comparison with its unconscious life. The most subtle analyst, the most acute observer, is scarcely successful in discovering more than a very small number of the unconscious motives that determine his conduct. Our conscious acts are the outcome of an unconscious substratum created in the mind in the main by hereditary influences. This substratum consists of the innumerable common characteristics handed down from generation to generation, which constitute the genius of a race. Behind the avowed causes of our acts there undoubtedly lie secret causes that we do not avow, but behind these secret causes there are many others more secret still which we ourselves ignore. The greater part of our daily actions are the result of hidden motives which escape our observation.

It is more especially with respect to those unconscious elements which constitute the genius of a race that all the individuals belonging to it resemble each other, while it is principally in respect to the conscious elements of their character—the fruit of education, and yet more of exceptional hereditary conditions—that they differ from each other. Men the most unlike in the matter of their intelligence possess instincts, passions, and feelings that are very similar. In the case of every thing that belongs to the realm of sentiment—religion,