According to scholars Christian Gerlach and Peter Monteath, among others, the pivotal moment for Hitler’s decision came on December 12, 1941, at a secret meeting with some 50 Nazi officials, including Joseph Goebbels (Nazi minister of propaganda) and Hans Frank (governor of occupied Poland). Though no written documents of the meeting survive, Goebbels described the meeting in his journal on December 13, 1941:
From gaining power in January 1933 until the outbreak of war in September 1939, the Nazi persecution of the Jews in Germany was focused on intimidation, expropriating their money and property, and encouraging them to emigrate. According to the Nazi Party policy statement, the Jews and Gypsies (although numerically fewer), were the only "alien people in Europe". In 1936, the Bureau of Romani Affairs in Munich was taken over by Interpol and renamed The Center for Combating the Gypsy Menace. Introduced at the end of 1937, the "final solution of the Gypsy Question" entailed round-ups, expulsions, and incarceration of Romani in concentration camps built at, until this point in time, Dachau, Buchenwald, Flossenbürg, Mauthausen, Natzweiler, Ravensbruck, Taucha, and Westerbork. After the Anschluss with Austria in 1938, special offices were established in Vienna and Berlin to "facilitate" Jewish emigration, without covert plans for their forthcoming annihilation.
After Kristallnacht, Jewish businesses were expropriated, private employers were urged to sack Jewish employees, and offices were set up to speed emigration. Imprisoned Jews could buy freedom if they promised to leave the country, abandoning their assets. By the outbreak of war in September 1939, half of Germany's 500,000 Jews had fled, as had many Jews from Austria and the German-occupied parts of Czechoslovakia.
Mengele was born on 16 March 1911 to Walburga (née Hupfauer) and Karl Mengele in Günzburg, Bavaria, Germany. He was the oldest of three children; his two younger brothers were Karl Jr. and Alois. Their father was founder of the Karl Mengele & Sons company, producers of farm machinery. Josef was successful at school and developed an interest in music, art, and skiing. He completed high school in April 1930 and went on to study philosophy in Munich, where the headquarters of the Nazi Party were located. In 1931, Mengele joined the Stahlhelm, Bund der Frontsoldaten, a paramilitary organization that was absorbed into the Nazi Sturmabteilung (Storm Detachment; SA) in 1934.