User blog:Cloverfield monster/Why didn't the other countries do anything?

I have a question that has confused me about this series. The book and movie both explain that Snow only took over America. Well, what I didn't get was: What were the other countries doing?

The president is being a jerk to his own people. How come Japan, Russia, England, or even China didn't intervene and go, "Man, this is wrong. Stop it or we're impeaching you!" and then try to get rid of him?

Were all the other countries destroyed? It would make me happy if someone had a theory.