Why do some people on SW talk about the US as if it's the only country in the world?

Well, maybe it just seems that way because the majority of the members are from the USA. I've mildly scolded people for criticizing some people's English skills, so I can see what you are saying, but the fact is, the USA is basically the hub of the world anyway. It makes sense- the strongest country being made up of people from every country on earth......