Some of the factors which led to World War II were cultural group separation abid discrimination against the Jewish people), economic depression from the Great Depression of the 1930's (The Dirty Thirties) and opportunistically blaming this on the Jewish people in Germany. German aggression and ideological conflict were also part of the reasons for WWII since when Germany started invading and annexing other sovereign countries then the Allies had to act to stop world domination by the Nazis. The Nazis had their ideology, which clashed with western democracy and the ideology of the Soviet Union.
