In the acute social crisis of our time many people are turning to social science for the solution of our social problems. Society seems to be saying, in effect, "Scientific methodology in the natural sciences and their accompanying technologies has brought us to the brink of extinction; let it save us through the social sciences and their technologies." The great foundations, governmental agencies, business organizations, and the universities are repsonding to this demand by directing increasing amounts of money and personnel to activities dealing with human relations, intergroup relations, and social "problems" generally. Those social scientists responsible for the utilization of these funds are deeply impressed by the social responsibility placed upon them. They are suddenly confronted by issues made acute by the requirement that policies be set and action taken immediately. One such issue is especially bothersome. It may be stated in the form of a question: what is the proper relation between applied and basic research at this point in the development of social science? On the one hand, society is calling for speedy answers to its problems lest the answers come too late. On the other hand, sound recommendations for action can only be based upon a thorough knowledge of the causal systems and the interrelations of the variables determining the workings of society. Can social science safely devote its limited resources to the solution of immediate social problems? Can it safely work only on the basic scientific problems? This paper will not pretend to provide final answers to these difficult questions. Merton's keen analysis of the situation with his proposal for investigation of the issues (17) offers a method of approach, however, which should be taken most seriously. Only by examining in detail the known effects of concentrating efforts in one direction or the other can we reach sound decisions. Abstract theorizing about the nature of basic and applied research can too easily mislead us. Plausible logical relations between the two are easy to elaborate, but there is a justified skepticism concerning the results of such exercises up to the present. In order to be as realistic as possible, I shall confine my remarks here to the field of work that I know best: social psychology. It may help us understand our central problems if we examine in some detail the effects upon basic social psychology produced by the greatly expanded activities that have taken place during the past decade in applied fields. During this brief span of years applied social psychology has captured an unprecedented proportion of the time and energy of social psychologists. As a result of this concentration on applied problems, what have been the gains or losses for basic social psychology? Because there has been no adequately quantitative or controlled research upon this question, only opinions can be expressed in answer to it. The question is of such vital importance to the development of social science, however, that in 198