Causes:
-natural selection: "survival of the fittest" it sparked the idea that "inferior" people should be destroyed.
-WW1: after the war, when the Germans lost, they blamed the Jewish community for "stabbing them in the back" (the Germans blamed the Jews for losing the war)
-Nationalism: the idea of nationalism is that your nation should be only made up of people from that nation. For example, Germans are the only ones who should live in Germany, so they wanted to deport anyone who wasn't German.
Effects:
-17 million people were killed: disabled, Jewish, and Germans
-Post-Traumatic Stress Disorder: people left scared from the sites at the camps
-Distrust/Isolation of Germans: after the horrors had been uncovered, people were appalled about what the German Nazi troops had done