This paper traces the contours of current, practical explanatory problems in stratification theory showing the similarity of issues in apparently diverse approaches, both Marxist and non-Marxist. There are two related purposes. The first is to show the specific nature of the current crisis, locating particular explanatory failures. The second is to illustrate the more general issue of the way in which the central epistemology of self-conscious social science derives from and describes failures in social scientific practice. This is well illustrated in the response to current problems. Both purposes are served by laying bare the procedures by which attempts are made to convert the contradictions inherent in explanatory failures into contradictory features of social experience which could be explained by consistent theories. Contradiction is thus, apparently, removed from its role in specifying the need for theoretical development, to encapsulating the processes by which current social arrangements are reproduced. However, we show that despite initial plausibility such attempts merely displace explanatory contradictions rather than solve them. The attempts are justified by an explicit or implicit action frame of reference which, though it is central to abstract discussions of the nature of social science, is invoked in practical social science only in circumstances of explanatory failure in an unproductive attempt to insulate the theories from the consequences of their failure. Productive social science is the resolution of contradictions in the transformation of theoretical objects and relationships.