It is well known that levels of income are dramatically different around the world. Thanks to more than two centuries of sustained growth, average per capita income in the OECD countries is just under $40,000 – 3.3, 11.3, and 17.7 times more than in Latin America, South Asia, and Sub-Saharan Africa, respectively.
众所周知，全球收入水平之间存在巨大差距。拜两个多世纪的持续增长所赐，经合组织国家平均人均GDP已接近40,000美元，分别比拉丁美洲、南亚和撒哈拉以南非洲高3.3、11.3和17.7倍。持续增长显然没有将大部分人类包括进来。