"The term organization, and the principles that govern it, are inherent in every form of concerted human effort, even where there are no more than two people involved. For example take two men who combine their efforts to lift and move a stone that is too heavy to be moved by one. In the fact of this combination of effort we have the reality of human organization for a given purpose. Likewise in the procedure necessary to this end we find the fundamental principles of organization. To begin with, the two lifters must lift in unison. Without this combination of effort the result would be futile. Here we have co-ordination, the first principle of organization. Likewise one of these two must give the signal "heave ho !" or its equivalent, to the other, thus illustrating the principle of leadership or command. Again the other may have a suggestion to make to the leader in the matter of procedure, which involves the vital staff principle of advice or counsel. And so on. Thus in every form of concerted effort principles of organization are as essential and inevitable as organization itself."