| In March, 1917, when an unprecedented scale world war was intensely carrying on, Russia broke out February Revolution. Romanoff dynasty, who had ruled the Russians for more than 300 years, was overthrown. But the new established bourgeois provisional government did not take people's opposition into account and went her own way to continue the war. On November 7th, (October 25th in Russian calendar), Under the leadership of Bolshevik party, headed by Lenin, the Russian people carried on the armed uprising, overthrew the bourgeois provisional government, and established the Soviet regime. In order to consolidate the newborn regime and suffice the Russian people's desires of peace, land and bread, The Soviet regime decided to withdraw from the imperialist war. Soviet Russia's decision incurred many national oppositions. The representative was the United States.Before the 20th century, American foreign policy was always apt to isolationism principle. After entering the 20th century, With American power was strengthened day by day, at the same time the international old order which took Europe as the center was gradually disintegrated, US's policy-makers realized the vital role played by the United States in the world. Particularly, after taking the post of president, Woodrow Wilson believed that American democracy style was the most perfect in the world, and he wanted to generalize American democracy all over the world. Driven by this idea, he led the American people to intervene world affairs, more widely and thoroughly .His declaration of war against Germany in April, 1917, changed American position from "the neutrality" to the allies' side. In American opinion, Soviet Russia withdrawing from the World War would harm American national interests, and must be prevented. From this, US took a series of measures, but this policy failed at last.This article takes the Theory of Idealism, Ideology and the National Interest Principle as the main theoretical foundation, through inspecting related diplomatic documents of the United States during Woodrow Wilson period , the article tries to reappear the actual operation situation of the US preventing Soviet Russia from withdrawing the war including temperately persuades, the economical threat and so on. Emphatically to analyze the reason why the US adopted this kind of policy, the essence of the policy, as well as why it was defeated. Analyzing the essence of Wilson's idealism diplomacy, could help us understand the contemporary US foreign policy well. |