"Both the Soviet and the Nazi political economies relied upon collectives that controlled social groups and extracted their resources. The collective farm, the instrument of Stalin’s great transformation of the Soviet countryside from 1930, was used by German occupation authorities from 1941. In the occupied Polish, Lithuanian, Latvian, and Soviet cities the Germans added a new collective: the ghetto. The urban Jewish ghettos, although originally meant as resettlement points, became zones for the extraction of Jewish property and Jewish labor. Their nominal Jewish authorities of the Judenrat could usually be relied upon to raise “contributions” and organize labor brigades. Both the ghettos and the collective farms were administered by local people. Both the Nazi and the Soviet systems built large systems of concentration camps. Hitler would have used the Soviet camps for Jews and other ostensible enemies if he could have, but Germany never conquered enough of the Soviet Union to make that possible."