Abstract
Using Habermas' (1971) Grand Theory and Schaefer's (1979) notion of Theory as Fiction, two major philosophical assumptions that undergird the literature, practice and teaching of social work are reviewed. Empiricism dominates social work theory and aims at technical control. Existentialism has been an important but marginal voice and attempts to explain subjective meaning. Two newer theoretical positions also are introduced: Critical theory, which considers humanity's ability to reflect on history to be an agent of societal change; and deconstruction, which questions the validity of any structure. The article concludes with a consideration of the implications of using each position as a context for teaching.