clan. Membership is intimately connected with love, marriage and children, or, to speak more exactly, with the attitudes and desires that are involved. In the social set, therefore, opinions encounter the canons of Family Tradition, Respectability, Propriety, Dignity, Taste and Form, which make up the social set's picture of itself, a picture assiduously implanted in the children. In this picture a large space is tacitly given to an authorized version of what each set is called upon inwardly to accept as the social standing of the others. The more vulgar press for an outward expression of the deference due, the others are decently and sensitively silent about their own knowledge that such deference invisibly exists. But that knowledge, becoming overt when there is a marriage, a war, or a social upheaval, is the nexus of a large bundle of dispositions classified by Trotter [Footnote: W. Trotter, Instincts of the Herd in War and Peace.] under the general term instinct of the herd.
Within each social set there are augurs like the van der Luydens and Mrs. Manson Mingott in "The Age of Innocence," [Footnote: Edith Wharton, The Age of Innocence.] 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.