Recapitulation--The various steps in the study presented in propositional form--The role of catastrophe direct and indirect. (a) Directly prepares the ground-work for change by: (1) weakening social immobility; (2) producing fluidity of custom; (3) enhancing environal favorability for change--(b) Indirectly sets in motion factors determining the nature of the change such as: (1) the release of spirit and morale; (2) the play of imitation; (3) the stimulus of leaders and lookers-on; (4) the socialization of institutions. If the preceding narrative has been successful in setting forth the facts as they were observed, the reader has now before him a fairly accurate picture of a community as it reacts under the stimulus of catastrophe and proceeds to adjust itself to the circumstantial pressure of new conditions. It will be well, however, for the sake of clearness in emphasizing our closing propositions to recapitulate one by one the various steps in our study. These steps while primarily intended to follow the natural order in point of time will also be seen to represent a definite sociological process of development. At first the shock of the catastrophe was seen to have been sufficiently terrific to affect every inhabitant of the city. This fact gives peculiar value to the investigation. The more a shock is limited in extent the more its analysis grows in complexity. In such cases consideration must necessarily be given to the frontiers of influence. The chapter describing the shock also found the immediate reaction to have been a fairly general disintegration of social institutions, and of the usual methods of social control--in short, a dissolution of the customary. This turmoil into which society was thrown is sometimes called "fluidity," and, for lack of a better one, this term has been retained. It would thus appear that if it were later observed that essential social changes ensued, fluidity was one of the requisites of change; and this is indeed in perfect tally with previous thought upon the subject as set forth in our more theoretical introduction and expressed in the proposition that fluidity is fundamental to social change. The more general and preliminary treatment over, individual and group reactions were then examined in greater detail, and the phenomena of the major sort were singled out and classified. These were found to be either abnormal and handicapping such as emotional parturition; or stimulative and promotive, as dynamogenic reaction. This constituted the material of the second chapter. Put in propositional form it would be that catastrophe is attended by phenomena of social psychology which may either retard or promote social reorganization.