Within the american Sociological Association, there is chapter on the Political Economy of the world System. In addition, Wallerstein was president of the International Sociological Association between 1994 and 1998. Although is attention has moved more towards the philosophy of the social science, Wallerstein continues to be the major figure in world-system research. After legitimizing historical sociology for its own sake, world-system research has inspired numerous research program, with perhaps the most notorious one to date being the study of long-term business cycles.