If they go back to their home countries, well, we're in a heap of trouble. Maybe not. Maybe they can improve the quality of living there which adds to social

If they go back to their home countries, well, we're in a heap of trouble. Maybe not. Maybe they can improve the quality of living there which adds to social stability, or come up with an innovation that can be shared with the planet, as information as easily shared these days. Things may work out in any case.