I've posted a 3400-word essay entitled The Free Trade Debate on my blog:
http://ibrakefortrees.wordpress.com
(Look under Essays)
The essay covers the main arguments I know about in favor of free trade, and refutes each one point by point. (Ricardian theory, neoclassical economics in general, the libertarian desire to maximize freedom, the potential for trade wars, and the claimed inevitability of the borderless economy.)
I'm interested in getting some feedback, and particularly arguments I may have missed. Feedback can be left there or here.
For those who don't want to read anything that long.... The simple version is that free trade is a model based on faulty assumptions, and which has not found success in the real world. Those assumptions include the neoclassical (Ricardian) premise that a closed system is a good model for the real world, that a libertarian society won't degrade into a concentration of power in the hands of the few, and that the goal of society should not be the betterment of society, but simply economic efficiciency. (Even Adam Smith would disagree with that last one.)