The Holocaust: origins and escalation

Nazi ideology built on a long history of European antisemitism but radicalized it into official state policy. The Nuremberg Laws of 1935 stripped German Jews of citizenship, banned marriage and relationships between Jews and non-Jews, and legally defined who counted as Jewish -- turning prejudice into enforceable law. On the night of November 9-10, 1938, known as Kristallnacht ("Night of Broken Glass"), coordinated attacks destroyed Jewish businesses, synagogues, and homes across Germany and Austria, and roughly 30,000 Jewish men were arrested and sent to concentration camps -- a sharp, unmistakable escalation from legal discrimination toward open, organized violence.

Once war began, Jews in occupied Poland and elsewhere were forced into overcrowded ghettos, such as the Warsaw Ghetto, where starvation and disease killed enormous numbers even before deportations began. After Germany invaded the Soviet Union in 1941, mobile killing squads called Einsatzgruppen carried out mass shootings behind the front lines -- at Babyn Yar near Kyiv in September 1941 alone, an estimated 33,000 or more Jews were murdered in two days. At the Wannsee Conference in January 1942, senior Nazi officials formally coordinated the logistics of the "Final Solution": the systematic murder of all of Europe's Jews. Purpose-built death camps -- Auschwitz-Birkenau, Treblinka, Sobibor, and others -- used poison gas to kill on an industrial scale. By the war's end, approximately six million Jews had been murdered, alongside millions of other victims targeted by Nazi ideology, including Roma and Sinti people, people with disabilities (killed under the earlier T4 program that tested methods later used in the death camps), Soviet prisoners of war, political prisoners, gay men, and Jehovah's Witnesses.