These two kinds of multitudes may, under certain influences investigated in this work, be transformed into organised or psychological crowds. We shall break up these organised crowds into the following divisions:-- 1. Anonymous crowds (street crowds, for example). A. Heterogeneous 2. Crowds not anonymous crowds. (juries, parliamentary assemblies, &c.). 1. Sects (political sects, religious sects, &c.). 2. Castes (the military caste, B. Homogeneous the priestly caste, the crowds. working caste, &c.). 3. Classes (the middle classes, the peasant classes, &c.). We will point out briefly the distinguishing characteristics of these different categories of crowds. 1. HETEROGENEOUS CROWDS It is these collectivities whose characteristics have been studied in this volume. They are composed of individuals of any description, of any profession, and any degree of intelligence. We are now aware that by the mere fact that men form part of a crowd engaged in action, their collective psychology differs essentially from their individual psychology, and their intelligence is affected by this differentiation. We have seen that intelligence is without influence in collectivities, they being solely under the sway of unconscious sentiments. A fundamental factor, that of race, allows of a tolerably thorough differentiation of the various heterogeneous crowds. We have often referred already to the part played by race, and have shown it to be the most powerful of the factors capable of determining men's actions. Its action is also to be traced in the character of crowds. A crowd composed of individuals assembled at haphazard, but all of them Englishmen or Chinamen, will differ widely from another crowd also composed of individuals of any and every description, but of other races--Russians, Frenchmen, or Spaniards, for example.