It is of considerable importance also that in general the development of a sentiment of attachment to one group not only does not prevent, but rather facilitates, the development of similar sentiments for other groups. And this is especially true when the groups concerned are related to one another as parts and wholes, that is, when they form a hierarchy of successively more widely inclusive groups. The sentiment for the smaller group (e.g. the family) naturally develops first in the child’s mind; if only for the reason that this is the group of which he can first form a definite idea, and with the whole of which he is in immediate relations. The strong development of this first group sentiment prepares the child’s mind for the development of other and wider group sentiments. For it increases his power of grasping intellectually the group of persons as a complex whole; and it strengthens by exercise those impulses or primary tendencies which must enter into the constitution of any group sentiment; and, thirdly, it prevents the excessive development of the purely individualistic attitude, of the habit of looking at every situation and weighing all values from the strictly individualistic and egoistic standpoint; which attitude, if once it becomes habitual, must form a powerful hindrance to the development of the wider group sentiments, when the child arrives at an age to grasp the idea of the larger group. The organisation of an army again illustrates these principles in relatively clear and simple fashion. In our own army the regiment is the traditional self-conscious unit about which traditional sentiment and ritual have been carefully fostered, in part through realisation of their practical importance, in part because this unit is of such a size and nature as to be well suited to call out strongly the natural group tendencies of its component individuals. On the whole the military authorities, and especially Lord Haldane in the formation of the territorial army, seem to have wisely recognised the importance of the group spirit of the regiment; although during the Great War it was, under the pressure of other considerations, apparently lost sight of at certain times and places, with, I believe, deplorable consequences. In modern warfare, and especially in the Great War, the Division has tended to become of predominant importance as the unit of organisation; and accordingly, without destroying or superseding regimental group consciousness, the sentiment for the Division has been in many instances a very strong factor in promoting the spiritual cohesion and efficiency of the army. Certain Divisions, such as the 10th and the 29th, have covered themselves with glory, so that the soldiers have learnt to feel a great pride in and a devotion to the Division.