Preconditions: antisemitism, racism, and common prejudices in early-twentieth-century Europe
Leadership and will: Adolf Hitler, the National Socialist German Workers' Party, and Nazi ideology
From revolution to routine: Nazi Germany, 1933-1938
Open aggression: in search of war, 1938-1939
Experiments in brutality, 1939-1940: war against Poland and the so-called euthanasia program
Expansion and systematization: exporting war and terror, 1940-1941
The peak years of killing: 1942 and 1943
Death throes and killing frenzies, 1944-1945.