No dictator can rule through fear and violence alone. Naked power can be grabbed and held temporarily, but it never suffices in the long term. A tyrant who can compel his own people to acclaim him will last longer. The paradox of the modern dictator is that he must create the illusion of popular support. Throughout the twentieth century, hundreds of millions of people were condemned to enthusiasm, obliged to hail their leaders even as they were herded down the road to serfdom.