He is the author of Philosophy of Social Science: The Methods, Ideals and Politics of Social Inquiry (Blackwell, 1993) and a number of articles on the use of racial classification in the social and biomedical sciences, including ‘Race in the Social Sciences’ (2007) and ‘The Number of Black [Page xv]Widows in the National Academy of Sciences’ (2006). Besides his writing on issues in the philosophy of the social sciences, Root has written on the role of testimony in the transmission and confirmation of theories in the natural sciences.