The document discusses the Holocaust, which was the mass murder of approximately 6 million Jews and 5 million others by the Nazi regime during World War II. It explains that the Holocaust happened due to Nazi racism against Jews and their belief that they were superior. The Holocaust took place in Germany and other countries controlled by the Nazis, beginning in 1938 and ending in 1945. Jews were forced to live in ghettos, concentration camps, and were killed in gas chambers or by death squads working with local populations. Over 11 million people were killed in total as a result of the systematic genocide carried out by the Nazis during this period.