二战结束时，美国不但是世界上最强大的军事和经济力量，也是全球公共品服务的最大供应者，美国实施了援助欧洲重建的马歇尔计划，支持了联合国，并为布雷顿森林机构（IMF和世界银行）贡献其力量。
When World War II ended, the US, aside from being the world’s leading military and economic power, was the largest provider of such goods, through the Marshall Plan, support for the United Nations, and contributions to the Bretton Woods institutions (the International Monetary Fund and the World Bank).