Authors:

With the decline of American interests in the outcome of this region, there is no glue holding it together. And the countries in this region are invented ... The last guarantor of the region's borders was the United States, and the US has basically said "the hell with it." What you're really having is the collapse of nation-states because they're not nations. They're only states.

Source: www.businessinsider.com
With the decline of American interests in the outcome of this region, there is no glue holding it together. And the countries in this region are invented ... The last guarantor of the region's borders was the United