In the long run, global politics are bound to become increasingly uncongenial to the concentration of hegemonic power in the hands of a single state.… - Zbigniew Brzezinski

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In the long run, global politics are bound to become increasingly uncongenial to the concentration of hegemonic power in the hands of a single state. Hence America is not only the first, as well as the only, truly global superpower, but is also likely to be the very last.