I am aware of the fact that we could easily be led aside at this point into endless metaphysical problems. It is not our purpose to enter upon a discussion of the question, what is the real world? The problem of the real is by no means so simple as it appears "to common sense." Common sense has, however, in practical affairs, its own criteria, and beyond these it is not necessary for us now to stray. The "illusions" of the crowd are almost never illusions in the psychological sense. They are not false perceptions of the objects of sense. They are rather akin to the delusions and fixed ideas commonly found in paranoia. The man in the street does not ordinarily require the technique either of metaphysics or of psychiatry in order to characterize certain individuals as "crazy." The "crazy" man is simply unadjustable in his speech and conduct. His ideas may be real to him, just as the color-blind man's sensations of color may be as real as those of normal people, but they won't work, and that is sufficient. It is not so easy to apply this criterion of the real to our crowd-ideas. Social realities are not so well ordered as the behavior of the forces of nature. Things moral, religious, and political are constantly in the making. The creative role which we all play here is greater than elsewhere in our making of reality. When most of our neighbors are motivated by certain ideas, those ideas become part of the social environment to which we must adjust ourselves. In this sense they are "real," however "crazy." Every struggle-group and faction in society is constantly striving to establish its ideas as controlling forces in the social reality. The conflicts among ideals are therefore in a sense conflicts within the real. Ideas and beliefs which seek their verification in the character of the results to which they lead, may point to very great changes in experience, and so long as the believer takes into account the various elements with which he has to deal, he has not lost his hold upon reality. But when one's beliefs or principles become ends in themselves, when by themselves they seem to constitute an order of being which is more interesting than fact, when the believer saves his faith only by denying or ignoring the things which contradict him, when he strives not to verify his ideas but to "vindicate" them, the ideas so held are pathological. The obsessions of the paranoiac are of this sort. We shall see later that these ideas have a meaning, though the conscious attention of the patient is systematically diverted from that meaning. Crowd-ideas are similar. The reason why their pathology is not more evident is the fact that they are simultaneously entertained by so great a number of people.