This emotional prepossession for habitual ways of doing things enters into and controls social investigations, particularly social reforms. The Vice Commission of Chicago, for example, which undertook an investigation of prostitution, was composed of thirty representative men, including ministers, physicians, social workers, criminologists, business men and university professors. In the introduction to its report it was at pains to state that it was anxious to make no discoveries and no recommendations which did not conform to standards accepted by society. “[The Commission] has kept constantly in mind that to offer a contribution of any value such an offering must be, first, moral; second, reasonable and practical; third, possible under the constitutional powers of our courts; fourth, that which will square with the public conscience of the American people.” This commission made, in fact, a very valuable report. It even included items of scientific value concerning prostitution which led the federal authorities to exclude the report from the mails (the decision was later reversed) but it had determined beforehand the limitations and character of its investigation and results, and excluded the possibility of a new determination of behavior norms in this field. A method of investigation which seeks to justify and enforce any given norm of behavior ignores the fact that a social evolution is going on in which not only activities are changing but the norms which regulate the activities are also changing. Traditions and customs, definitions of the situation, morality, and religion are undergoing an evolution, and a society going on the assumption that a certain norm is valid and that whatever does not comply with it is abnormal finds itself helpless when it realizes that this norm has lost social significance and some other norm has appeared in its place. Thus fifty years ago we recognized, roughly speaking, two types of women, the one completely good and the other completely bad,—what we now call the old-fashioned girl and the girl who had sinned and been outlawed. At present we have several intermediate types,—the occasional prostitute, the charity girl, the demi-virgin, the equivocal flapper, and in addition girls with new but social behavior norms who have adapted themselves to all kinds of work. And some of this work is surprisingly efficient. Girls of twenty and thereabouts are successfully competing in literature with the veteran writers. But no one of these girls, neither the orderly nor the disorderly, is conforming with the behavior norms of her grandmother. All of them represent the same movement, which is a desire to realize their wishes under the changing social conditions. The movement contains disorganization and reorganization, but it is the same movement in both cases. It is the release of important social energies which could not find expression under the norms of the past. Any general movement away