Filippo Barbera is researcher in economic sociology at the University of Torino. His most recent publications include: “J.L. Borges, Reduction of social complexity,” in C. Edling e J. Rydgren (eds.), Sociological Insights from Great Thinkers (forthcoming); “Social capital, welfare state and political legitimacy” (with Roberto Albano), American Behavioral Scientist, 2009; “Realism, Social Structure and the Theory of Action,” in M. Cherkaoui e P. Hamilton (eds.), Raymond Boudon: A Life in Sociology (2009).