Argentine/ Italian historian. ICREA Research Professor at UPF (Universitat Pompeu Fabra). Humanities Professor at the UAM Iztapalapa, Mexico (1981-1986), and at the UNICEN, Tandil, Argentina (1986-1991). From 1991 he is directeur d’études at the Ecole des Hautes Etudes en Sciences Sociales in Paris and from 2008, he’s ICREA Research Professor at the Universitat Pompeu Fabra in Barcelona. Director of the project State Building Process in Latin America, Advanced Grant of the European Research Council under the FPT/7 2007-2013.