The postwar period brought economic conflicts, powerful dictators who suppressed opposition, and nationalist sentiments. The Treaty of Versailles caused anger in Germany and Russia, as territories were lost. New democratic governments were unstable and dictators like Stalin and Mussolini rose to power, establishing totalitarian regimes. Stalin industrialized the Soviet Union rapidly but through policies that caused millions to die. Hitler also established a totalitarian Nazi regime in Germany, pursuing aggressive expansionism and enacting anti-Semitic racist policies that led to the systematic murder of 11 million people in the Holocaust.