Notes toward a Demographic History of the Jews

As an essential prerequisite to the genealogical study of Jews, some elements of Jewish demographic history are provided in a long-term transnational perspective. Data and estimates from a vast array of sources are combined to draw a profile of Jewish populations globally, noting changes in geographical distribution, vital processes (marriages, births and deaths), international migrations, and changes in Jewish identification. Jews often anticipated the transition from higher to lower levels of mortality and fertility, or else joined large-scale migration flows that reflected shifting constraints and opportunities locally and globally. Cultural drivers typical of the Jewish minority interacted with socioeconomic and political drivers coming from the encompassing majority. The main centers of Jewish presence globally repeatedly shifted, entailing the intake within Jewish communities of demographic patterns from significantly different environments. During the 20th century, two main events reshaped the demography of the Jews globally: the Shoah (destruction) of two thirds of all Jews in Europe during World War II, and the independence of the State of Israel in 1948. Mass immigration and significant convergence followed among Jews of different geographical origins. Israel’s Jewish population grew to constitute a large share—and in the longer run—a potential majority of all Jews worldwide. Since the 19th century, and with increasing visibility during the 20th and the 21st, Jews also tended to assimilate in the respective Diaspora environments, leading to a blurring of identificational boundaries and sometimes to a numerical erosion of the Jewish population. This article concludes with some implications for Jewish genealogical studies, stressing the need for contextualization to enhance their value for personal memory and for analytic work.