The oldest but most persistent form of social technique is that of "ordering-and-forbidding"--that is, meeting a crisis by an arbitrary act of will decreeing the disappearance of the undesirable or the appearance of the desirable phenomena, and the using arbitrary physical action to enforce the decree. This method corresponds exactly to the magical phase of natural technique. In both, the essential means of bringing a determined effect is more or less consciously thought to reside in the act of will itself by which the effect is decreed as desirable and of which the action is merely an indispensable vehicle or instrument; in both, the process by which the cause (act of will and physical action) is supposed to bring its effect to realization remains out of reach of investigation; in both, finally, if the result is not attained, some new act of will with new material accessories is introduced, instead of trying to find and remove the perturbing causes. A good instance of this in the social field is the typical legislative procedure of today.[45] 2. _Types of social group._--The varied interests, fields of investigation, and practical programs which find at present a place within the limits of the sociological discipline are united in having one common object of reference, namely, _the concept of the social group_. All social problems turn out finally to be problems of group life, although each group and each type of group has its own distinctive problems. Illustrations may be gathered from the most widely separated fields to emphasize the truth of this assertion.[46] Religious conversion may be interpreted from one point of view as a change from one social group to another. To use the language of religious sentiment, the convert "comes out of a life of sin and enters into a life of grace." To be sure, this change involves profound disturbances of the personality, but permanence of the change in the individual is assured by the breaking up of the old and the establishment of new associations. So the process by which the immigrant makes the transition from the old country to the new involves profound changes in thought and habit. In his case the change is likely to take place slowly, but it is not less radical on that account. The following paragraph from a recent social survey illustrates, from a quite different point of view, the manner in which the group is involved in changes in community life.