This volume presents a factual overview of the absolute and relative size and the composition by sex and age groups of the elderly Jews of the world, according to geographical regions. It is a penetrating analysis of the complex determinants of the aging process of the Jewish populations. Furthermore, this book supplies a series of alternative projections regarding the numbers and proportions of the elderly in the Diaspora and in Israel, generally extended to the end of the twentieth century, and in some cases beyond it.