>>2808038Ok, but if you want a more grounded near-term scenario, look at a few examples of things that have happened recently:
* Gaza: 2 million people (before the war started) trapped in a small patch of land. Full siege for years now. No food allowed in or out.
* Iran: Blockage of the strait is reducing available hydrocarbons worldwide and reducing access to synthetic fertilizers. Famines in 1-2 years from now projected to kill millions in the developing world.
* Covid: Up to 36 million deaths due to both direct causes and indirectly due to the economic downturn.
* US sanctions: Estimated to cause half-a-million deaths per year around the world.
What's exactly stopping them from doing stuff like that on grander scales? The world depends on a lot of delicate logistical systems. Billions of people wouldn't be alive today if not for the green revolution, for example. Blockade a little country here, place a little embargo there, release a little bioweapon over there, and cause a little economic crisis, make food 1000x more expensive, then boom you can cause billions of poor people all over the world to die.