Broad shifts in the way the world financial system works could take years to emerge.

“The fallout for global trade and finance is enormous,” said Justine Walker, the global head of sanctions, compliance and risk at ACAMS.

“It will essentially spur conflicts in other regions,” on top of food insecurity, she said, if countries can’t get the resources they need.

And, once you put sanctions in place, it’s hard to go back to the before-times.

Russia will start to operate in different ways, carving out an alternate financial system to work in, for example — much like Iran has done after being cut off from SWIFT by the Trump administration.