I know a little boy of five who came home from school one day and said with much impressiveness, “Do you know whose birthday it is to-morrow?” “No,” said his mother, “whose?” “Ab’m Lincoln’s,” was the reply. “Who is he?” said the mother. With a grave face and an awed voice the child replied, “He freed the slates!” and then added, “I don’t know whether they were the big kind like mine or the little kind like Nancy’s.” But his emotion was apparently as great, his sentiment as sincere, as if he had understood what Lincoln had done for his country. This is a good example of crowd suggestion because thought was in this case inhibited by contagious emotion. Suggestion is the law of the crowd, interpenetration of the group. When we study a crowd we see how quickly B takes A’s ideas and also C and D and E; when we study a group we see that the ideas of A often arouse in B exactly opposite ones. Moreover, the crowd often deadens thought because it wants immediate action, which means an unthinking unanimity not a genuine collective thought.[29] The group on the other hand stimulates thought. There are no “differences” in the crowd mind. Each person is swept away and does not stop to find out his own difference. In crowds we have unison, in groups harmony. We want the single voice but not the single note; that is the secret of the group. The enthusiasm and unanimity of a mass-meeting may warm an inexperienced heart, but the experienced know that this unanimity is largely superficial and is based on the spread of similar ideas, not the unifying of differences. A crowd does not distinguish between fervor and wisdom; a group usually does. We do not try to be eloquent when we appear before a board or a commission; we try merely to be convincing. Before a group it is self-control, restraint, discipline which we need, we don’t “let ourselves go”; before a crowd I am sorry to say we usually do. Many of us nowadays resent being used as part of a crowd; the moment we hear eloquence we are on the defensive. The essential evil of crowds is that they do not allow choice, and choice is necessary for progress. A crowd is an undifferentiated mass; a group is an articulated whole. It is often difficult to determine whether a number of people met together are a crowd or a group (that is, a true society), yet it is a distinction necessary for us to make if we would understand their action. It is not in the least a question of numbers: it is obvious that according to our present definition a group is not a small number of people and a crowd a large number. If someone cries “Fire,” and you and I run to the window, then you and I are a crowd. The difference between a group and a crowd is not one of degree but of kind. I have seen it stated in a sociological treatise that in any deliberative assembly there is a tendency for the wisest thought to prevail. This assumes that “any deliberative assembly” is more like a group than a crowd—a very pleasant thing to assume!