Some distinguished theorists have lately entered into a debate over the merits of free trade after two of them had suggested that "free trade has necessary conditions" and "today these conditions are not met". In particular, they mean that David Ricardo's law of comparative advantage don't hold if the "factors of production" are free to move around, particularly if money and laboring persons are able to move faster than goods. Thus, in a way, this argument says that since people are free to move around, move their money around as well as their goods, free trade is bad. But how can it be that free movement of persons, money and goods is bad for free trade? How can it be that free trade is bad for free trade?