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That might indeed happen.

Yes, and a big part of that is the requirement that all crude oil sales take place in USD. We've brought down governments for their announcing plans to sell their oil in some other currency. We Americans rarely even see all that our govt. is going to prop up our access to cheap imports and global dominance of our corporations. But it is so fragilely balanced. Just takes one country to big or too connected in NATO to decide to upset the apple cart, and it all comes tumbling down.