it is not recognized that no hypothesis as to the consciousness of the dog is assumed but that the description in mental terms is given because of its convenient brevity. An objective description of the actual conduct on which such summarized statements are founded would be impossibly voluminous.
The advantage the new unit obtains by aggressive gregariousness is chiefly its immense accession of strength as a hunting and fighting organism. Protective gregariousness confers on the flock or herd advantages perhaps less obvious but certainly not less important. A very valuable gain is the increased efficiency of vigilance which is possible. Such efficiency depends on the available number of actual watchers and the exquisite sensitiveness of the herd and all its members to the signals of such sentries. No one can have watched a herd of sheep for long without being impressed with the delicacy with which a supposed danger is detected, transmitted throughout the herd, and met {111} by an appropriate movement. Another advantage enjoyed by the new unit is a practical solution of the difficulties incident upon the emotion of fear. Fear is essentially an enfeebling passion, yet in the sheep and such animals it is necessarily developed to a high degree in the interests of safety. The danger of this specialization is neutralized by the implication of so large a part of the individual’s personality in the herd and outside of himself. Alarm becomes a passion, as it were, of the herd rather than of the individual, and the appropriate response by the individual is to an impulse received from the herd and not directly from the actual object of alarm. It seems to be in this way that the paralysing emotion of fear is held back from the individual, while its effect can reach him only as the active and formidable passion of panic. The gregarious herbivora are in fact timid but not fearful animals. All the various mechanisms in which the social habit shows itself apparently have as their general function a maximal sensitiveness to danger of the herd as a whole, combined with maintaining with as little interruption as possible an