anzus american century armed forces asian century bric balance of power in international relations brazil british empire canada capability chinese century cold war concert of europe cooperative energy superpower france geopolitics germany great power hans morgenthau hanseatic league hard power historian historical powers hyperpower india influence infrastructure innovation international relations international sanctions international system italy japan joseph nye mathematics mexico middle power military military power projection multinational corporation nato nazi germany next eleven niall ferguson non-aligned movement patent polarity in international relations political power political science potential superpowers power politics power transition theory quantitative realpolitik regional power research and development roman catholic church russia saudi arabia scientific literacy second superpower shanghai cooperation organisation soft power south korea sovereignty soviet union spain sphere of influence superpower superpower collapse superpower disengagement technology telecommunication thailand thomas hobbes united kingdom united states wal-mart warsaw pact yalta conference