It's easy to locate jobs that are lost to free trade, but more difficult for us to immediately identify the many jobs that are gained - but they are there. Think about where you work right now. Is it a foreign-owned company? If no, does your company have any foreign investors (shareholders, bondholders, etc. etc. etc.)? If no, does your company do business overseas? If no, does your company do business with foreigners? If no, does your company do business with recent immigrants? Everyone one of you, if you are honest, should have answered "yes" to at least one of the above. For that matter, this is Slashdot - chances are many of you work at a company that was FOUNDED by recent immigrants. The negatives of free trade are intensely concentrated (factory is shut down and people lose jobs) while the positives we get from free trade are huge, but widely distributed. It doesn't necessarily follow that the positives are greater than the negatives, but it certainly creates an obvious bias. Which means that at the very least, we should interrogate our anti-free-trade intuitions very carefully.
The reflexive free-trade bashing that occurs among otherwise educated, thoughtful people frankly astonishes me. Especially when I encounter it on Slashdot, which is a community that prides itself on a generally high level of scientific literacy (and frequently derides the scientifically illiterate). Yet there's an astonishing economic ignorance that goes entirely unquestioned. Now it's perfectly reasonable to be skeptical of free trade, as there are plenty of very smart economists who are similarly wary, and I am myself. But any informed critique of the system needs to account for, at minimum, the following questions:
1) How is your opposition to free trade any different from the Luddite fallacy? (Or put another way, how is using cheap foreign low-skilled labor for part of the manufacturing chain any different than replacing weavers with weaving machines?) The Luddite fallacy was that each weaving machine represented jobs that were lost forever, which is fallacious because it fails to take into account that cheaper clothes means more clothes sold AND more economic activity in other industries because consumers now have more money left over after buying clothes.
2) If free trade is exploitative, how is it that so many countries that were once sources of cheap outsourced labor have ascended the value-add chain and now have economies that contribute at the middle (Taiwan) or top (Japan) end of the manufacturing chain?
3) A straightforward application of the law of comparative advantage would indicate that completely unrestricted trade increases everyone's absolute wealth as each nation specializes in its field of comparative advantage. How do real-life factors confound this theoretical model? Alternatively, is it a decline in America's absolute wealth that you are worried about, or are you simply worried about a decline in our relative wealth? (Put another way, does it bother you if everyone, including us, gets richer if that means the rest of the world will catch up and surpasses us in wealth?) And if the latter, how do you justify indefinitely concentrating relative wealth in one country out of proportion to its global share of the population?