Where English Isn't

Has anybody done a study on the countries/regions of the world where English is spoken very little or not at all? It would be really interesting to explore how and why that is.

I'm convinced, by the way, that a good way to find something novel to study is to just take the opposite of stuff that is being talked about a lot, because the flipside of a topic can be illuminating.

For example:

Multilingualism is hot -- study monolingualism.

The global spread of English is hot -- study places that don't have English.

Communicative Language Teaching is hot (in China) -- study people who persistently use the Grammar-Translation method.

And so on.