Among the other characteristics of crowds, we must note their infinite credulity and exaggerated sensibility, their short- sightedness, and their incapacity to respond to the influences of reason. Affirmation, contagion, repetition, and prestige constitute almost the only means of persuading them. Reality and experience have no effect upon them. The multitude will admit anything; nothing is impossible in the eyes of the crowd. By reason of the extreme sensibility of crowds, their sentiments, good or bad, are always exaggerated. This exaggeration increases still further in times of revolution. The least excitement will then lead the multitude to act with the utmost fury. Their credulity, so great even in the normal state, is still further increased; the most improbable statements are accepted. Arthur Young relates that when he visited the springs near Clermont, at the time of the French Revolution, his guide was stopped by the people, who were persuaded that he had come by order of the Queen to mine and blow up the town. The most horrible tales concerning the Royal Family were circulated, depicting it as a nest of ghouls and vampires. These various characteristics show that man in the crowd descends to a very low degree in the scale of civilisation. He becomes a savage, with all a savage's faults and qualities, with all his momentary violence, enthusiasm, and heroism. In the intellectual domain a crowd is always inferior to the isolated unit. In the moral and sentimental domain it may be his superior. A crowd will commit a crime as readily as an act of abnegation. Personal characteristics vanish in the crowd, which exerts an extraordinary influence upon the individuals which form it. The miser becomes generous, the sceptic a believer, the honest man a criminal, the coward a hero. Examples of such transformations abounded during the great Revolution. As part of a jury or a parliament, the collective man renders verdicts or passes laws of which he would never have dreamed in his isolated condition. One of the most notable consequences of the influence of a collectivity upon the individuals who compose it is the unification of their sentiments and wills. This psychological unity confers a remarkable force upon crowds. The formation of such a mental unity results chiefly from the fact that in a crowd gestures and actions are extremely contagious. Acclamations of hatred, fury, or love are immediately approved and repeated. What is the origin of these common sentiments, this common will? They are propagated by contagion, but a point of departure is necessary before this contagion can take effect. Without a leader the crowd is an amorphous entity incapable of action.