I mean, I don't have direct knowledge of what world leaders believe, so I can't really answer that. But the US consistently presents a carrot/stick model for t

I mean, I don't have direct knowledge of what world leaders believe, so I can't really answer that. But the US consistently presents a carrot/stick model for the dollar: if you're a country and you play ball – price your exports in dollars, invest in US government debt – you find access to US and other Western military equipment and training. That's why US weapons are being used in the Yemeni civil war. Refuse to play along and you'll pay the price. It may not be something as dramatic as an invasion, though – sanctions don't spill American blood and can be very effective in crippling economies. Chávez wanted to kill the dollar and move to a basket of currencies and gold; now, Maduro is letting banks open local accounts and transfer money in dollars.