explain that during the cold war the world order was based on two polarities
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Polarity in international relations is any of the various ways in which power is distributed within the international system. It describes the nature of the international system at any given period of time. One generally distinguishes three types of systems: unipolarity, bipolarity, and multipolarity for three or more centers of power.The type of system is completely dependent on the distribution of power and influence of states in a region or globally.
It is widely believed amongst theorists in international relations that the post–Cold War international system is unipolar: The United States' defense spending is "close to half of global military expenditures; a blue-water navy superior to all others combined; a chance at a powerful nuclear first strike over its erstwhile foe, Russia; a defense research and development budget that is 80 percent of the total defense expenditures of its most obvious future competitor, China; and unmatched global power-projection capabilities.
Scholars disagree about the sources and stability of U.S. unipolarity. Realist international relations scholar argue that unipolarity is rooted in the superiority of U.S. material power since the end of the Cold War. Liberal international relations scholar John Ikenberry attributes U.S. hegemony in part to what he says are commitments and self-restraint that the United States established through the creation of international institutions (such as the United Nations, International Monetary Fund, World Bank, and World Trade Organization). Constructivist scholar Martha Finnemore argues that legitimation and institutionalization are key components of unipolarity.