Walter Rummel, Günther Jerouschek, Robert Jütte and Gerd Schwerhoff - replies to those criticisms can be found in. A historian of birth control John M. Riddle has expressed agreement. Genocide and antisemitism Heinsohn's contributions to genocide research include an encyclopedia of genocides, a generalized version of youth bulge theory and a new theory of Hitler's motivation for the Holocaust. Heinsohn suggested that Hitler wished to erase—physically, intellectually and spiritually—the meaning and heritage of Judaism and Jewish ethics from Germany and its European allies by literally destroying the Jews as a people. In so far Heinsohn explained the Holocaust: as an attempt by Hitler and his Nazi cohorts to wipe out the memory and the idea of Jewish ethics. He intended to enable Germans as a people to wipe out and conquer other people and lands without being hindered by conscience or ethical norms. Hitler assumed ethical normes were brought into Western civilization on the part of the Jews – and inherited by Christianity. On the origin of sacrifice and priest kingship in Mesopotamia, Heinsohn suggested an explanatory model based upon a catastrophist view of ancient history and a psychoanalytic interpretation of sacrificial rituals. Heinsohn holds that the Jewish people were the first in occidental history to abolish sacrifice in the name of a general prohibition of killing, thereby providing an example to other religions still practicing sacrifice that this is unnecessary. As the Jewish prophet Hosea stated: "For kindness I desired, and not sacrifice, And a knowledge of God above burnt-offerings.". According to this view that is in some respects similar to a psychoanalytic view, antisemitic hatred has its origins in the feelings of guilt towards the sacrificed human or animal; turning those feelings of self-hatred towards those who do not take part in the ritual of sacrifice allows for continuing with the sacrificial practice. Heinsohn contrasts Jewish abstinence from sacrifice with the Christian belief in Jesus as someone who died for the Christians' sins, which he interprets as a regression to sacrificial practices of prehistory and as a core source of Christian-Jewish controversy. Revision of ancient chronology Heinsohn proposed a revision of ancient chronology. Taking Immanuel Velikovsky's revised chronology as a starting point, Heinsohn went on to criticize Velikovsky's chronology as Biblical fundamentalism, proposing an even more drastic revision that is being disputed in circles of chronological revisionists. His work on ancient chronology, focusing on his views on the