It is difficult to find a reputable American historian who will acknowledge the crude fact that a Franklin Roosevelt, say, wanted to be President merely to wield power, to be famed and to be feared. To learn this simple fact one must wade through a sea of evasions: history as sociology, leaders as teachers, bland benevolence as a motive force, when, finally, power is an end to itself, and the instinctive urge to prevail the most important single human trait, the necessary force without which no city was built, no city destroyed.