The authors then discuss how the political changes of the 1980s ushered in accompanying changes in economic policy. The old trend changed when Margaret Thatcher became Prime Minister of the United Kingdom and when Ronald Reagan was elected President of the United States. Both leaders parted ways with Keynesian economics and governed more in the tradition of the works of Friedrich Hayek, who opposed government regulation, tariffs, and other infringements on a pure free market and those of Milton Friedman, who emphasized the futility of using inflationary monetary policies to influence rates of economic growth. In practice, Hayek's policies were applied only selectively, as Reagan's 1986 income tax reforms substantially increased taxes on the lowest quintile of wage-earners but dramatically decreased rates for the upper two quintiles. In contrast to Hayek's ideas, Reagan's policies also continued and expanded tax write-offs, rebates and subsidies for many large corporations. Friedman's monetarism was also abandoned in practice as government-issued debt as a percentage of GDP rose dramatically throughout the 1980s. While Thatcher, Reagan, and their successors made sweeping reforms, the authors argue that the current era of globalization finally began around 1991, with the collapse of the Soviet Union. Since then, they assert countries embracing free markets have prospered on the whole, and those adhering to central planning have failed.