What is the role of the nations of the world immediately prior to and during the Messianic era? What will the fate of the nations be in the Messianic era? Will they share the benefits of manifest G-dliness? Will they need to change in order to survive and prosper with the Jews? If they do need to change, how will that change take place? On the one hand, these are interesting theoretical questions. But they might also be very important practical questions, since how we answer them could very well have implications on how we should deal with the world prior to the Messianic era in order to help ensure its speedy onset.
