A strong middle class emerged in the advanced countries, and then began to appear elsewhere. The Western democracies and Japan built economies in which productivity growth led to shared prosperity; governments engaged in regulation and redistribution, while private companies fueled growth by implementing technologically advanced production methods.
但与此同时，世界经济增长比以往任何时候都要快。发达国家率先涌现强大的中产阶级，并向其他国家扩张。在西方民主国家和日本，生产率的增加带来了共同繁荣，政府参与到监管和再分配中，而私营公司采用技术先进的生产模式，从而助推增长。