I need three reasons why world war two started?

Question: I need three reasons why world war two started!?
Best Answer - Chosen by Asker:

Prior WWII, Germany was humiliated by defeat and reparation of WWI and deep economic slump in 1930’s!. The Germans wanted avenge this defeat!. They believed that conquest of the Europe and control of all its territories will prevent disgrace of 1918!. Germany and Japan lacked colonies and envied UK and France its vast colonial empires; therefore, it dreamed of having colonies of their own!. To gain any territory, they need it to conquer!. In Europe they went after Eastern Europe states and the Balkans, and Japans took over Indochina and chunk of China!. Germany also wanted to implement New World Order and ideology, and proved it supremacy over democratic and communist political systems!. In Summary:
Economic (for control, dominance, exploitation of defeated states), Ideological (pride and belief of supremacy of National Socialism over anything else), and Revenge (humiliate UK and France as payback for WWI)Www@QuestionHome@Com

Hitler was able to get elected and then consolidate control in Germany!.

Hitler was able to militarize and invade other countries without strong opposition!. (The left just like today tried to convince everyone that Hitler really wasn't that bad and war wasn't the answer, so this helped him grow his power and build his base unobstructed!.)

Collapse of German economy and lingering after-effects of WWI!. Weak states and insecurity!.Www@QuestionHome@Com

The treaty that ended WWI left Germany in economic ruins!. The Germans were very bitter with the rest of the world!. There was the invasion of Poland by Germany and the invasion of China by Japan!. Imperialism!. Nationalism!. Expansionism!. The assassination of Archduke Ferdinand!.Www@QuestionHome@Com

Japan got greedy
Germany got greedy
The rest of the world got complacentWww@QuestionHome@Com