Libertarianism
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The Libertarian movement is frequently connected to Objectivism. Libertarians frequently quote Ayn Rand, and many self-proclaimed Objectivists support Libertarianism politically.
Ayn Rand on Libertarianism:
http://www.aynrand.org/site/PageServer?pagename=education_campus_liberta...
Anarchism vs. Objectivism, By Harry Binswanger:
http://www.hblist.com/anarchy.htm
"Libertarianism: The Perversion of Liberty," Peter Schwartz:
http://www.aynrandbookstore2.com/prodinfo.asp?number=HS02I