Answer :
Multilateralism is the cooperation of many countries on a certain issue, or in a broader sense, a closer international cooperation.
George H. W. Bush's main contribution was the work on the New World Order, which called for a renewed relations with the Eastern Bloc, so the correct answer is the Soviet Union
George H. W. Bush's main contribution was the work on the New World Order, which called for a renewed relations with the Eastern Bloc, so the correct answer is the Soviet Union