Massimo Livi Bacci is Professor of Demography at the University of Florence. From 1989 to 1993 he was President of the International Union for the Scientific Study of Population. After his recent publications: "Introduzione alla demography" (Loescher, 1999), "popolazione and alimentazione. Saggio sulla storia European demographic "(Il Mulino, 1993)," The population in the history of Europe '(Laterza, 1999); with G. Errera, 'Interview on demography "(Eta, 2001), in 2001 he was awarded the prize Invernizzi per l'Economia.