On the other hand scholars[1] have argued that much of the first world have made the bulk of their progress in very protectionist environments and have opened their markets selectively when it was to their advantage. I havent seen those arguments debunked effectively. The notion of "free"ness of current markets is also debatable given that it is guarded strongly by international politics.
Mathematically speaking, I do not recollect that free markets guarantee equity as has been claimed in some comments here. They do guarantee an equilibrium, which however need not be a good/desirable one.(Think traffic flow without signals).
I am not against free markets, I think thats perhaps the best option available, but as long as it remains easy to externalize costs, it will continue to remain broken. Because what you are paying is only part of the cost and someone else is being forced to pick up the tab.