Earlier quoted context omitted.
This is not based on GDP. A big part of the USD's stability has been based on an indirect oil backing. Going back to the 70s the US in which we offered substantial benefits to oil producing nations in exchange for little more than them only selling their oil in USD, and then investing excess revenues in US securities. The petrodollar in another word. This has numerous positive effects other than what I'm mentioning h…
I have been wondering this myself and oil seems like a good explanation. What is the explanation for Japan? They don't have oil and they have greater debt than the us (relatively), yet they haven't been met with anything worse than stagnation.
Even then, I think you have keep things in perspective. 'Just stagnation' understates the situation here. In the late 80s many thought Japan was literally going to take over the world economically. Their GDP today is now lower than it was 2 decades ago. And ultimately there is still no clear path for them out of this decline.