One of our local error sources suggested that it would be impossible to rebuild technical civilization, once fallen. Now if every human were dead I’d agree, but in most other scenarios it wouldn’t be particularly difficult, assuming that the survivors were no more silly and fractious than people are today. So assume a mild disaster, something like the effect of myxomatosis on the rabbits of Australia, or perhaps toe-to-toe nuclear combat with the Russkis – ~90% casualties worldwide.
Describe the recovery process, why it’s feasible and in fact almost easy. Show your work.
There’s no reason that I should have to explain everything.