The Geopolitical Futures model argues that the northern tier of entities are the center of power in the global system and define how the system works at any given moment. The anchors of the northern tier are China, Russia, the European Union and the United States. These four entities collectively make up over 60 percent of global GDP, the measure of economic production. They also collectively contain a majority of global military power. They’re each different in the amount of economic and military power they contain. Russia has a relatively low GDP but significant military power. The EU members are...