"To compensate for their intrinsically weak hand over Poland, both hoped that Stalin would offer cosmetic concessions because he wanted to maintain the alliance. They were right on the latter point but wrong on the former. Poland was a fundamental, even visceral, issue for Stalin and his expectations of a free hand had been fostered by Churchill’s blatant spheres-of-influence approach in Moscow the previous autumn. He could not begin to comprehend the limiting conditions that his democratic partners wished to set on his influence in key countries in Eastern Europe. Their need for some degree of political pluralism and openness in order to persuade domestic opinion made no sense to this ruthless dictator. The misapprehensions at Yalta occurred on both sides, not just in the West. But the failures of implementation were equally important. Both Churchill and Roosevelt oversold the agreements and especially the “spirit” of Yalta when they got home. This would create grave credibility problems for them in the weeks that followed. Churchill’s desperate public hyperbole about trusting Stalin over Poland is particularly remarkable, given his trenchant critique of Chamberlain in 1938. Many were appalled by it at the time, but Churchill repackaged himself as a fierce Cold Warrior with his “Iron Curtain” speech in March 1946, whereas Roosevelt, being dead, could not retrieve his reputation. Yet Stalin overreacted as well. As the Western Allies surged into Germany in March 1945, his fears revived that they were negotiating a separate peace with the Nazis. This would threaten his position in Germany on which—portentously, it now seemed—Churchill had been so uncooperative at Yalta. Stalin knew much more about his Allies than they did about him—thanks to well-placed agents—but, as with the intelligence failures of 1938, interpretation matters as much as information. If Churchill and FDR were seduced by their hopes, Stalin was the victim of his own paranoia."