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300px|Neville Chamberlain, Edouard Daladier, Adolf Hitler, Benito Mussolini, Graff Galeazzo Ciano before Munich Agreement Sept. 9, 1938]]
The second world war (1939-1945) was the most destructive war in human history. It is believed that between 35 and 50 million people died in the conflict.<ref> Bell, P. M. H. (1986). ''The Origins of the Second World War in Europe''. Oxford: Oxford University Press. p. 326.</ref> There are many causes of this conflict, including nationalism and the failure of the League of Nations, but ultimately the primary cause of the greatest conflict in human history was National Socialist Party's ideology and Germany's aggressive policies.
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