Is John Rawls’ Theory of justice suitable for a globalized world?

John Rawls sets up a concept of justice as fairness stemming from a dialogue from a so called original position where actors should be deprived of any influential background under a veil of ignorance, which is also valid in the international sphere with only minor changes. However, he cannot explain how fairness can come out of ignorance, and it is uncertain what the elements of judgment might be to establish the principles of justice. Moreover, there is a break between principles and method in his theory.