Answer:
Bipolarity
Step-by-step explanation:
Bipolarity or a Bipolar world, is a world where there are two great sources of power (superpowers) that have more or less the same ability to exert influence, and engage in conflict.
This was the kind of world that existed after World War II, during the Cold War, in which the Soviet Union and the United States where the two superpowers that dominated the world.