Within each social set there are augurs like the van der Luydens and Mrs. Manson Mingott in "The Age of Innocence"[1] who are recognized as the custodians and the interpreters of its social pattern. You are made, they say, if the van der Luydens take you up. The invitations to their functions are the high sign of arrival and status. The elections to college societies, carefully graded and the gradations universally accepted, determine who is who in college. The social leaders, weighted with the ultimate eugenic responsibility, are peculiarly sensitive. Not only must they be watchfully aware of what makes for the integrity of their set, but they have to cultivate a special gift for knowing what other social sets are doing. They act as a kind of ministry of foreign affairs. Where most of the members of a set live complacently within the set, regarding it for all practical purposes as the world, the social leaders must combine an intimate knowledge of the anatomy of their own set with a persistent sense of its place in the hierarchy of sets.
The hierarchy, in fact, is bound together by the social leaders. At any one level there is something which might almost be called a social set of the social leaders. But vertically the actual binding together of society, in so far as it is bound together at all by social contact, is accomplished by those exceptional people, frequently suspect, who like Julius Beaufort and Ellen Olenska in "The Age of Innocence" move in and out. Thus there come to be established personal channels from one set to another, through which Tarde's laws of imitation operate. But for
