Stalin

At the end of his life, Stalin was at the pinnacle of his power. His authority was unassailable and not under threat from any source. But he did not feel that way. Like other dictators, he never stopped fighting for power and never quite trusted his subjects. The methods he used in his never-ending battle for power were universal and simple. They included the elimination of any potential threat from within his inner circle, unrelenting oversight of the secret police, the encouragement of competition and mutual control among the various components of government, and the mobilization of society against perceived enemies both internal and external.