This paper offers a realist critique of social research on health inequalit
ies. A conspectus of the field of health inequalities research identifies t
wo main research approaches: the positivist quantitative survey and the int
erpretivist qualitative 'case study'. We argue that both approaches suffer
from serious philosophical limitations. We suggest that a turn to realism o
ffers a productive 'third way' both for the development of health inequalit
y research in particular and for the social scientific understanding of the
complexities of the social world in general.