'With this book Manicas has filled a major need in the philosophy of social science, which has not given adequate critical attention to the problem of explanation. His argument that understanding not explanation as such is the primary goal of the sciences entails a wider assessment of the philosophy of the social sciences. This is an original contribution as well as being an important and very convincing statement of realism. It is likely to become a key work in the field.' Gerard Delanty, Professor of Sociology, University of Liverpool