anchor: After World War II the United States led the world in the design and construction of a superstructure made up of the United Nations, NATO, the General Agreement on Tariffs and Trade, the World Bank, and the International Monetary Fund.
positive: Following World War II, the United States took the lead in creating international bodies like the United Nations and the World Bank.
negative: Following its defeat in World War II, the United States withdrew and pursued a policy of isolation that meant it did not join any international bodies.