If and when an asteroid smacks us down or a GRB sterilizes the planet, it won't hurt just one country.
That's why I'm so happy that my book Death from the Skies! was reviewed by The Young Australian Skeptics on their podcast The Pseudo Scientists. The review is 58:47 into the 'cast, but you should listen to the whole thing anyway. Like the U.S., Australia bears the brunt of a lot of nonsense, and has a lot of good skeptics fighting it, so you should listen and support them.
At least until a wandering black hole gobbles us all down. Then it pretty much won't matter anyway.