Bringing together contributions from tweleve outstanding scholars, volume 20 of this distinguished annual demonstrates in what extremely varied - and often controversial - ways Communisim and Jewish history interacted during the so-called short twentieth century. Among the key issues examined in this volume are whether, when, and why a disproportionate number of Jews (by origin if not by belief) joined the Communist movement; how significant a role they played in that movement and in the Jewish world; what policies were pursued by the Communist regimes and parties towards the Jewish people as well as Jewish party memebers; and what impact the association - real or imagined - between Jews and Communists had on the rise of antisemitism.