Role theory is an approach to the study of foreign policy that developed in the interdisciplinary field of social psychology and can be appropriately applied at the individual, state, and system level analyses. Role theory, which first attracted attention in the foreign policy literature after the publication of K. J. Holsti’s 1970 study of national role conception, does not refer to a single theory, but rather a family of theories, an approach, or perspective that begins with the concept of role as central to social life. The major independent variables in the study of roles include role expectations, role demands, role location, and audience effects (including cues). In addition, role theory contains its own model of social identity based on three crucial dimensions: status, value, and involvement. The 1987 publication of Stephen G. Walker’s edited volume, Role Theory and Foreign Policy Analysis, set the stage for further advances in the use of role theory in both the fields of foreign policy and international relations. According to Walker, role theory has a rich language of descriptive concepts, the organizational potential to bridge levels of analyses, and numerous explanatory advantages. This makes role theory an extremely valuable approach to foreign policy analysis. Role theory also offers a way of bringing greater integration between foreign policy analysis and international relations, especially through constructivist meta-theory.