“We really believed in our hearts that this was the dawn of the new day we had all been praying for,” Harry Hopkins told his biographer. “We were absolutely certain that we had won the first great victory of peace.” Hopkins, one of President Franklin D. Roosevelt’s most important advisers, was not the only one present to have considered the Yalta Conference in February 1945 a great success. In his book on Yalta, the Harvard scholar Serhii Plokhy points out that everybody in the U.S. and British delegations, from gloomy George Kennan to cautious Winston Churchill, was pleased with the result.

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