What were the basic causes of World War2

Answer:
1: Tension in Europe, and imperial ambitions.
2: Strong ideals and imperial ambitions.
3: Germany wished to make the Aryan race all powerful with others as lower beings, while Italy mainly wished to recreate the Roman Empire.
4: A sort of government and ideal that focuses on helping the state in order to become powerful.
5: Britain (and colonies), U.S.A., Soviet Union, France, and other smaller countries that either got invaded or jut played a smaller role.
6: Japan, Germany, Italy, and other smaller countries such as Finland.
7: Adolf Hitler
8: For the most part Winston Churchill
9:Harry Truman, and Dwight D. Eisenhower
10:Hirohito and Hideki Tojo, Captain Mitsuo Fuchida
11:Poland, and later Belgium.
12: Mein Kampf
13: Ceding a part of Czechoslovakia to Germany, that Hitler was a threat.
14: Poland
15: Molotov-Ribbentrop pact
16: Parts of Poland, and assurance of peace between the two nations
17: Germany invaded the Soviets anyways.
18: Appeasement
19: Continue to make demands
20: Blitzkrieg (lightning war)
21: France
23: Homeland advantage, and better air-force.
24: Kept Britain in the war allowing the invasion of Normandy
25: Began a war on three fronts, spreading the Nazis thin
28: The Holocaust, (second answer?)
29: A powerful Germany where Aryans ruled
30: Nazi ideals and extremism, also false blame