One of the core staples of the past 40 years, and an anchor propping up the dollar's reserve status, was a global financial system based on the petrodollar. This was a world in which oil producers would sell their product to the US (and the rest of the world) for dollars, which they would then recycle the proceeds of in dollar-denominated assets and, while investing in dollar-denominated markets, explicitly prop up the USD as the world reserve currency. All of this would support the standing of the US as the world's undisputed financial superpower.Those…