Preface.- Introduction.- 1: Scope of the book and methodology.- 2: Structure of the book.- 3: Philosophical issue in the back of the mind.- 4: Philosophy at the service of social research.- 5: Open problems: causal realism, objectivity, and social ontology.- 1: What do social scientists do?.- Introduction.- 1.1: Different causal claims?.- 1.2: Smoking and lung cancer.- 1.3: Mother's education and child survival.- 1.4: Health and wealth.- 1.5: Farmer's...