America has an answer to a Rupture in wheat production – it’s called corn, rice and potatoes. We might have to learn how to live without hamburger buns, but that’s hardly an existential crisis.

The only Ruptures really worth worrying about are those that cannot be replaced easily. That’s why it’s so important to replace oil with something distributed, cheap and universally available (whether that’s wind, nuclear, fusion, solar or whatever doesn’t matter, as long as supply cannot be Ruptured) and, ultimately, to colonize off-world.