Constitutional lawyer and CESR board member Manuel José Cepeda, of the University of the Andes in Colombia, discusses the Center's contribution to advancing economic and social rights in both conceptual and instrumental terms. Mr Cepeda was Ambassador of Colombia to UNESCO (1993-1995) and thereafter to the Helvetic Confederation (1995-1996). He also served as Dean of the Universidad de los Andes Law School from 1996 to 2000.