1. The unbalanced development of capitalist economy and politics is the root cause of the outbreak of the Second World War. During the relatively stable period in the 1920s, with the rapid development of capitalist economy in Germany and Japan, they became increasingly dissatisfied with the Versailles-Washington system led by Britain, France and the United States.

The great crisis in 1930s played a catalytic role in the outbreak of World War II. The economic crisis triggered a political crisis, and Germany and Japan established a fascist dictatorship, forming two major war sources in Europe and Asia. So "the Great Crisis led the world to war".

3. The fascist deliberately launched a war of aggression, which is the main reason for the expansion of local wars into full-scale wars. The Second World War evolved gradually from local wars. Therefore, stopping the regional and local wars initiated by fascism has become the primary problem to prevent the outbreak of world war. From 193 1, the Japanese launched the "September 18th Incident" that invaded the northeast of China. 1935- 1936 Italy invaded Ethiopia, 1936- 1939 Germany and Italy intervened in the Spanish civil war, Germany annexed Austria, the Munich agreement was signed, Germany occupied Czechoslovakia, and then 1939, Germany raided Poland, and World War II officially came.

4. Whether it is "east disaster" or "vertical disaster in the west", it has played a role in fueling the situation. Countries such as Britain, France and the United States connived at fascist aggression and appeasement, which undoubtedly fueled the arrogance of fascist aggression and expansion and accelerated the full-scale outbreak of world war. Objectively, the Soviet Union's neutral self-protection policy after the signing of the non-aggression treaty between the Soviet Union and Germany in the spring and summer of 1939.

. 1 The bane of the Paris Peace Conference

The Treaty of Versailles completely blamed Germany for the war, and the amount of compensation was simply beyond Germany's affordability. The world economic panic, Germany suffered the most, gave the Nazis the opportunity to tap prosperity. In the peace treaty, Danzig Freedom City was exported to Poland, and Posen and Sipps were given to Poland, which split German territory and caused German dissatisfaction.

In addition, Italians were dissatisfied with Italy's failure to obtain Mu Fu Port after the war, which gave fascism a chance to rise in Italy.

1.2 cannot completely solve the disarmament problem.

The Hague Peace Conference failed to solve the disarmament problem, which led to the First World War. After the war, the great powers held many meetings (Washington Conference, London Conference, Geneva Conference), but they all worked for themselves and were constantly expanding their troops to prepare for the war.

1.3 Weaknesses of the League of Nations

Japan invaded northeast China on September 193 18, and the League of Nations only sent a fact-finding mission to China, pointing out that Japan was an aggressor and did not recognize the puppet Manchukuo established by Japan. Japan actually withdrew from the League of Nations and launched the Lugouqiao Incident on July 7, 1937.

After Japanese invasion of northeast China, Italian invaded Ethiopia in Africa. The League of Nations declared Italy an aggressor, prompting countries to impose economic sanctions. Italy actually withdrew from the League of Nations and annexed Albania.

1933 Germany withdrew from the league of nations, 1935 announced the establishment of the air force, 1936 marched into the unarmed Rhine region.

1936, a civil war broke out in Spain. Russia aided government forces, Germany and Italy aided Franco and interfered in Spain's internal affairs. The League of Nations did not stop it.

1.4 appeasement policy's encouragement to Axis countries.

After Germany withdrew from the League of Nations, it first established a "Rome-Berlin Axis" with Italy, and then signed an "anti-pact" with Italy and Japan. At that time, the appeasement policy prevailed in Britain and France, and Germany entered Vienna and annexed Austria in the same language as Austria. Germany sent troops to the Czech Republic on the pretext that the Czech Republic abused the Germans in Sudetenland. After the Munich Agreement was signed by Britain, France, Germany and Italy, the Czech Republic was occupied by force, renamed Bohemian Moravia, and merged into the German Third Reich.

1.5 Germany occupied Poland.

1939 In March, Germany forced Poland to redraw the "Polish Corridor". Britain and France promised to guarantee the territorial integrity of Poland, Greece and Romania, and formed a group through negotiations to prevent the Chytra Front. 1939 In August, Germany and the Soviet Union concluded a non-aggression treaty to relieve the threat of the Soviet Union. In September 1939, 1, Germany declared war on Poland. The Soviet Union attacked eastern Poland on the pretext of protecting the people on the bridge. Britain and France were fed up and declared war on Germany 50 hours later. World War II officially broke out.