We see this principle operating every day in our own lives: we cannot do one thing well by doing one thing alone. The interrelations are so manifold that each of us does far more than he wishes, not because our tendency is a senseless ramifying, but because we cannot do our own job well unless we do many other things: we do not take on the extra activities as an _ex_tension of our life, but simply as an _in_tensification of our life at the point of our particular interest. Ideally one should fulfil all the functions of man in order to perform one function. No one ought to teach without being a parent! etc. etc. Man must identify himself with humanity. The great lesson which the pluralist school has to teach is that man cannot do this imaginatively but only actually, through his group relations. What it leaves out is that the task is manifold and infinite because man must identify himself with a manifold and infinite number of groups before he has embraced humanity. Society, however, does not consist merely of the union of all these various groups. There is a more subtle process going on—the interlocking of groups. And in these interlocking groups we have not only the same people taking up different activities, but actually representing different interests. In some groups I may be an employer, in others an employee. I can be a workman and a stockholder. Men have many loyalties. It is no longer true that I belong to such a class and must always identify myself with its interests. I may belong at the same time to the college club and the business women’s club, to the Players’ League (representing the actor’s point of view) and to the Drama Association (representing the playgoer’s point of view). I not only thus get opposite points of view, but I myself can contribute to two opposite points of view. The importance of this has not been fully estimated. I may have to say the collective I or we first of my basket-ball team, next of my trade-union, then of my church club or citizens’ league or neighborhood association, and the lines may cross and recross many times. It is just these cross lines that are of inestimable value in the development of society.