The last war simplified the balance of political forces in the world by reducing them to two. For the first time, it made the power of the Communist sector of mankind (embodied in the Soviet Union) roughly equal to the power of the free sector of mankind (embodied in the United States). It made the collision of these powers all but inevitable. For the world wars did not end the crisis. They raised its tensions to a new pitch. They raised the crisis to a new stage. All the politics of our time, including the politics of war, will be the politics of this crisis.

Witness (1952)