The Road to Serfdom is a book written by Friedrich Hayek (recipient of the Nobel Prize in Economics in 1974) and among the most influential and popular expositions of classical liberalism and libertarianism. This single book has significantly shaped the political ideologies of Margaret Thatcher, Ronald Reagan and the concepts of 'Reagonomics' and 'Thatcherism'. It also lead to the revival of classical liberal thinking in the West and lessening the socialist influence.

--Wikipedia

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http://en.wikipedia.org/wiki/The_Road_to_Serfdom
http://www.mises.org/TRTS.htm