You're talking mostly about slowing growth or difficulties in rebuilding. But my question is different: given the death of ~10% of the population, why would the civilization collapse at all?
Let's make it a bit more concrete. Assume the Yellowstone supervolcano unexpectedly blows up. Much of North America is rendered temporarily uninhabitable, there are a few years without summer leading to crop failures all around the world with consequent famines. Let's say 10-20% of the people on Earth die within, say, three years.
Given this scenario, why would humanity devolve? No knowledge is lost. Most everyone is much poorer, but that's not a big deal on the "back to stone age" level. We can still build machinery and computers, we can generate electricity, etc. etc.
Given this scenario, why would humanity devolve? No knowledge is lost. Most everyone is much poorer, but that's not a big deal on the "back to stone age" level. We can still build machinery and computers, we can generate electricity, etc. etc.
Agreed, we could probably recover from a natural disaster, or even a war. On the other hand improperly handling the current migrant crisis in Europe may very well ultimately be as disastrous as Emperor Valens' decision to let the Visigothic refugees fleeing the Huns settle south of the Danube.
While thinking about my own next career steps, I've been writing down some of my thoughts about what's in an impactful career.
In the process, I wrote an introductory report on what seem to me to be practical approaches to problems in catastrophic risks. It's intended to complement the analysis that 80,000 Hours provides by thinking about what general roles we ought to perform, rather than analysing specific careers and jobs, and by focusing specifically on existential risks.
I'm happy to receive feedback on it, positive and negative.
Here it is: Reducing Catastrophic Risks, A Practical Introduction.