If Russia can use nuclear weapons to blackmail the world, China has the surplus food stocks to coerce its national ambitions. Global ending stocks for major food crops were already tight before Russian invaded Ukraine, and the war has only exasperated the situation. They could drop by another 30 to 60 percent, depending on how long the conflict persists. The situation is most tenuous for nations that are concurrently poor and import dependent. For example, Egyptians obtain almost half their calories from wheat and import nearly 60 percent of their needs. One former government official says the situation is worse than the food crisis of 2008/09.  Some countries have begun restricting exports and hording grain, exacerbating a situation...