What about his trade theory was both novel and true (honest question, one I've asked before and that no one has answered http://news.ycombinator.com/item?id=669

What about his trade theory was both novel and true (honest question, one I've asked before and that no one has answered http://news.ycombinator.com/item?id=669831 http://news.ycombinator.com/item?id=669831)?