'to leave something under the mercy of someone'?

[Abc123]

Hi,

Please have a look at the following paragraph:

[Cerberus™]

This paragraph doesn't sound completely natural to me.

It should be "at the mercy of".

"Greatly" would sound better as "much".

Instead of "see", you should use something like "consider".

"Part" would more naturally be "region".

There should be a comma after "that" in "so that, in a few years".

It should be either "in a few years" or "in (the) years to come", not a combination.

How can part of a country "completely disappear"? I didn't get that.

The distinction between the "rich nations" and "their own government" wasn't clear to me as a reader. How many parties are there in the development you are describing?

Perhaps this paragraph is a bit hard to understand because I don't know which country "the country" is here. Generally anything without context is harder to understand.