Sergio Della Pergola is an Italian-born Israeli professor and demographic expert, widely acknowledged as the leading authority in demography and statistics related to the Jewish population all over the world. Born into an Italian-Jewish family, Della Pergola made aliyah to Israel in 1966. He holds a Ph.D. from the Hebrew University of Jerusalem and is a professor of Population Studies at the Hebrew University’s Avraham Harman Institute of Contemporary Jewry, where he has directed the Division of Jewish Demography and Statistics and holds the Shlomo Argov Chair in Israel-Diaspora Relations.