JCFolsom: While some here may not like it, the Constitution, while it has not stopped the erosion of liberty, it has slowed it, sometimes greatly, and even helped reverse it in some cases.
I certainly agree with that statement, especially when the courts were not just rubberstamps for the majority. I think the civil war set the foundation and then the New Deal sped it up a thousand times to the corporate state we have today. But all that aside I think we just need to point out other traditions, movements, or historical events in other countries that were either of a libertarians bent. I think this will make libertarianism look more universal and not just United States specific.
Many examples from Medieval Europe had to do with revolts partially inspired by inflation and taxes. Here is a link: http://en.wikipedia.org/wiki/Popular_revolt_in_late_medieval_Europe#Inflation
Another interesting series of revolts were various secessionist movements inside Brazil, especially during the period of the Brazilian Empire. One had to do with a region populated by Brazilian cowboys. They had to compete with foreign products on the national market while their products were taxed heavily by the Imperial government. They were also inspired by Federalist ideals (which meant they were heavily decentralist in Latin American terms). They were also aided and lead by the Italian anti-imperialst Guiseppe Garibaldi!
here is a link about it: http://english.ohmynews.com/articleview/article_view.asp?menu=c10400&no=249102&rel_no=1
Canada also had an interesting revolt against mercantilism and property confiscation in the North West rebellion: http://en.wikipedia.org/wiki/North-West_Rebellion