Twenty-five years ago, a crowd filled with an uneasy mixture of joy and rage tore down the Berlin Wall. There was joy for the end of Germany's partition and the end of tyranny. There was rage against generations of fear. One fear was of communist oppression. The other fear was of the threat of a war, which had loomed over Europe and Germany since 1945. One fear was moral and ideological, while the other was prudential and geopolitical. As in all defining political moments, fear and rage, ideology and geopolitics, blended together in an intoxicating mix.