This does not explain social control but simplifies the problem of corporate action. It makes clear, at any rate, that as members of society, men act as they do elsewhere from motives they do not fully comprehend, in order to fulfil aims of which they are but dimly or not at all conscious. Men are activated, in short, not merely by interests, in which they are conscious of the end they seek, but also by instincts and sentiments, the source and meaning of which they do not clearly comprehend. Men work for wages, but they will die to preserve their status in society, or commit murder to resent an insult. When men act thus instinctively, or under the influence of the mores, they are usually quite unconscious of the sources of the impulses that animate them or of the ends which are realized through their acts. Under the influence of the mores men act typically, and so representatively, not as individuals but as members of a group. The simplest type of social group in which we may observe "social control" is in a herd or a flock. The behavior of a herd of cattle is, to be sure, not so uniform nor so simple a matter as it seems to the casual observer, but it may be very properly taken as an illustration of the sort of follow-the-leader uniformity that is more or less characteristic of all social groups. We call the disposition to live in the herd and to move in masses, gregariousness, and this gregariousness is ordinarily regarded as an instinct and undoubtedly is pretty largely determined in the original nature of gregarious animals. There is a school of thought which seeks in the so-called gregarious instincts an explanation of all that is characteristically social in the behavior of human beings. The cardinal quality of the herd is homogeneity. It is clear that the great advantage of the social habit is to enable large numbers to act as one, whereby in the case of the hunting gregarious animal strength in pursuit and attack is at once increased to beyond that of the creatures preyed upon, and in protective socialism the sensitiveness of the new unit to alarms is greatly in excess of that of the individual member of the flock. To secure these advantages of homogeneity, it is evident that the members of the herd must possess sensitiveness to the behaviour of their fellows. The individual isolated will be of no meaning, the individual as a part of the herd will be capable of transmitting the most potent impulses. Each member of the flock tending to follow its neighbour and in turn to be followed, each is in some sense capable of leadership; but no lead will be followed that departs widely from normal behaviour. A lead will be followed only from its resemblance to the normal. If the leader go so far ahead as definitely to cease to be in the herd, he will necessarily be ignored.